Note: This story was dynamically reformatted for online reading convenience. Under the terms of the Berne convention all works by this author are copyrighted. Re-posting, redistribution, inclusion in another work, or any other use of it is strictly prohibited without the express, written permission of the copyright holder, except that it may be posted as part of a review. For permission, please e-mail: storyguy@hotmail.com or visit my website at:/~storyguy/ TWINS - 3 3A - Over the next few months, the girls continued to grow up. They had gotten bras for their birthday and were filling them nicely. Their monthly cycles had also started. One month when they came over, Terry had bored Chris to death talking about her new boyfriend and how wonderful he was. Although he wasn't really interested, he had let her ramble on about his virtues. One thing did remain the same, though. Each time they were over, Chris had made sure that the zipper on his bag and Tara's were facing each other. Their mutual masturbation sessions continued. Terry, always the first to fall asleep, never suspected a thing even though it was obvious to her that her sister and Chris had a "thing" going between them. They had stopped playing house in the fort, partially because of them growing up but mostly because the weather had turned cold due to the season. One special incident did occur. One one particular weekend, just before their fourteenth birthday, they had gone to bed as usual. Chris waited for what he expected was enough time. "Terry?" he whispered. No response. He repeated himself with the same results. Satisfied that she was asleep, he unzipped his bag and reached for the zipper on Tara's bag. When he started to unzip hers, she stopped him. "I can't." she said. "Why?" he asked. "Don't tell Terry that you know but its our 'time of month' so I can't do anything." "Oh, OK." Chris disappointedly mumbled. "Sorry." Tara answered. Silence fell upon the two for a while. After a few moments, Tara again spoke, "I can do it to you if you want." "That's OK. You don't have to." was the reply. After another period of silence, Tara asked, "Are you hard?" Chris did not answer. Tara unzipped her bag and reached toward Chris slipping her hand into his bag. She went right to his crotch and found his hard rod. "Take your pants off." she requested. "You don't have to. Its OK." Chris repeated. "I wanna try something." Tara told him. "What?" Chris asked. "Just do it." Tara pleaded. "OK" Chris said as he slipped his clothes off, "Now what?" "Just lay on your back and don't move." she commanded. He did as she requested and watched as she sat up and evidently looked over at her sister. She seemed to study her for a moment and then turned towards Chris. She reached for the edge of his bag and started to push it off of him. He instinctively grabbed it and started to say something but she put her finger to her lips to silence him. Reaching back to the bag, she once again pushed it off of him. This time he allowed her to do what she wanted to. Once he was uncovered, she reached down and took his cock in her hand. She hesitated for a moment and then lowered her head. She stuck her tongue out and touched the rod with it a few times and then lowered her mouth around it. Chris remained still as he was uncovered. He didn't know what Tara was going to do. He felt her fingers wrap around hid dick and then she lowered her head. Something touched his cock and then he was engulfed in a warm, moist place. He immediately knew what she was doing. He had heard about blow jobs before but never imagined that he would get one from Tara! It was a feeling like none other he ever had. A moan escaped his lips as she started to move. Tara had heard some of the girls at school talking about taking a boy's cock in their mouth. Some said that they liked it. Some said that they hated it. Some said it was just OK but most seemed to do it. She had already tasted cum when Chris had squirted on her hand. It felt funny in her mouth but hadn't tasted bad. She had decided to try it. Chris's cock was now in her mouth and it didn't feel that bad. Chris's moan told her that he liked it so she decided that she would do it. She started to move her mouth up and down the shaft. It seemed slippery but not slimy. The idea of having a boy's cock in her mouth excited her. Chris couldn't believe the sensations he was feelings. His hand felt good on his cock when he masturbated, her hand felt better, but nothing compared to her mouth. Instead of rubbing in a hand, his rod was gliding in and out of her mouth. The intense sensations made him go quickly. He stiffened as his cock shot off. Tara glided her mouth over the cock. She could tell that Chris was enjoying it as he withered around. She felt him stiffen and his cock filled her mouth with cum. The suddenness has surprised her. She swallowed out of instinct only to have her mouth filled again. She kept swallowing until her mouth was empty. She had kept on moving up and down his cock as he climaxed. She now felt his cock getting softer and knew that he had finished. She let his cock slip from her mouth and laid back down in her sleeping bag. She had done it - her first blow job. Thinking back, she didn't think it was that bad. She hadn't climaxed but at least he had. She was proud of herself. This time there had been no mess either. She could still taste the ruminants of cum in her mouth. She smiled. As she looked up, she saw Chris looming over her. He leaned down and kissed her on the mouth. That made her feel even better. Some of the girls had said that the boys wouldn't kiss them after they had done it and that made them feel dirty. Chris had kissed her so she knew that she wasn't dirty. She drifted off to sleep. 3B - Once summer came again, the three started to spend more time in the old fort. They really didn't play in it anymore but used it sort of as a clubhouse where they could talk. On one particular weekend when the girls came over, Tara told Chris that Terry had broken up with her boyfriend and that she had been a little "on the edge" lately. She suggested to Chris that maybe he could help her. He said that he didn't know how he could help and she had not explained further. Terry and Chris were of the second floor of the fort talking and Tara had gone downstairs for something. "I haven't been felling too well, lately." Terry began. She was interrupted by Tara yelling up. She said that she was hot and was going to take a shower. After she was finished she would make lunch and bring it out to the rest. She asked what they wanted and orders were given. Tara then left and went to the house. "I think I might have a fever." Terry continued. "I hope you're not getting sick." responded Chris. "Do you think that you could check for me?" "I don't know where the thermometer is." answered Chris. "Maybe you could just feel to see if I'm hot?" queried Terry. "Sure." said Chris as he reached for Terry's forehead. "That won't work." said Terry as she took his hand. "I'm kinda different... ah, um, God, this is kinda embarrassing but we're friends, right?" Chris nodded. "Do you remember a long time ago when we pretended to take each other's temperature in here?" Chris again nodded. "Well, um, that's the only way to tell if I have a fever. Could you, um, would you, um, ah, do you think that you could, um, check me like that?" By this time Terry was bright red. "Sure," answered Chris, "no problem." He sat down in one of the chairs. "Thanks." responded Terry, smiling, "you must think I'm kinda weird or something." "No way," comforted Chris, "everybody's different. Its OK." "Promise you'll never tell a soul?" blushed Terry. Chris again nodded. "OK." continued Terry as she unsnapped her jeans, "This is so embarrassing..." "Don't worry about it." Chris encouraged. Terry, although still red, smiled and then draped herself over Chris's lap. She pushed her clothes down and exposed her teen ass. "Go ahead." Chris stuck his finger in his mouth to wet it and then touched it to Terry's rear opening. He applied a little pressure and her ass seemed to open to allow his finger to slip in to the first knuckle. Terry inhaled sharply as the finger entered her ass. "Deeper," she murmured, "you gotta to go in deeper." Chris, applying only the slightest pressure, felt his finger sink deep into her ass. "Mmmm," escaped Terry's lips. Trying to keep up her fiscade, she groaned, "Do I feel hot?" Chris, realizing what Terry really wanted, answered, "I can't tell yet." as he started moving his finger around. She grabbed his ankle as his finger moved. Her breathing was becoming ragged. Every time he pushed his finger to the hilt, Terry gasped. After a few minutes of his manipulations, he felt Terry stiffen and she clamped down on his finger. A little squeal came from her throat, then she relaxed. He knew that she had climaxed but he said nothing about it. He slipped his finger out of her asshole. "I don't think you have a fever." he said, giving her the opportunity to keep her desires a secret, even though both knew the truth. She rested for a moment and then stood, her pants still bunched around her ankles. She reached for her bikinis, and while pulling them up said, "Thanks for checking anyway." "That's OK." he answered, "Anytime you want me to check, just ask." She smiled at him and then reached for her jeans. "Lunch is ready." Tara called from downstairs. 3C - The next weekend that the girls came over, per usual, Chris had arranged the bags. They had just turned fourteen. After his turn in the bathroom, he went into his room and climbed into his bag. He didn't bother to zip his bag but immediately stripped to the waist knowing what was going to happen. He laid on his back and waited. He heard rustling in Tara's bag and knew that she was stripping too. Then, instead of silence, he heard a zipper and then felt her hand reach into his bag and grab his cock. He thought it strange that she had not checked to see if her sister was asleep. He rolled onto his side and reached into her bag. Finding her pussy hair, he lowered his hand. This time, however, she didn't raise her leg but kept her two legs firmly together. She continued to fondle him but resisted his pressure on her leg. After a short time, she released her hold on his cock and rolled over, facing away from him. He heard some more rustling and then she scooted backwards until her bare ass was sticking out of her bag. She reached back and took hold of his cock and gently pulled it towards her. Following her lead, he moved in closer to her and found that his cock was aiming toward a wet asshole. It was then that he realized that this was Terry and not Tara. He didn't know why the switch but his cock was in no mood for a discussion. He pushed and the tip of his cock popped in. "Easy." Terry said. He pushed slower and heard, "Wait!" He stopped. The two remained motionless for a few minutes. "OK." she said and he pushed a little more. "Wait." he again heard and stopped. "OK" again and he pushed some more. "Go slow" she commanded. He slowed and tried to be gentler. Slowly he sank into her asshole until he could go no further. "Are you all the way in?" she questioned. "Ugh-Huh" he answered. She paused for a while and then started to rock her hips. He picked up her rhythm and started to match her movements. She started to groan. He couldn't believe how tight she was. His pace quickened and she met his every thrust. He felt her stiffen then clamp down on his cock. The pressure seemed to squeeze the climax out of him and he exploded pumping his cum deep into her ass. She groaned and pushed back hard against him. He, in return, pushed as deep as he could into her. He relaxed as his orgasm subsided but remained in her. As he laid there, he felt his cock soften and soon pop out. After a few moments, she stood and announcing that she had to go to the bathroom, left the room. As soon as she left, Tara asked, "Did you like that?" "Yea, but why did you switch without telling me?" he asked. "You're not mad or anything, are you?" "No, its OK." he reassured her, "I was just wondering." "Well, you know what an ass freak she is. She's wanted to try that for a while but she hasn't had a boyfriend. Where it was our birthday, I told her she could try it on you. At first she said no so I told her that we have been fooling around. She asked how so I told her. Then she said OK. She's so dumb that she didn't think you'd know the difference so don't say anything, OK?" "OK" "You're sure your not mad?" "No, its OK. It was kinda fun." "You're sweet. Next time we're over will be your birthday. I got something special for you." "What?" "You'll see..."