Mom finally speaks up, "Well, now..." but she hesitates. "I saw the two of you this morning. Your father did too." O Shit. "Edward, he said it's time you and I had a serious talk about a few things. Let's go up to my bedroom. Robyn, I think you had better come along, too."

"I'm sorry, Mom. I...I don't know what happened..." I stammer.

"It's OK. We were waiting for your birthday to do this, but as usual, it looks like you can't wait." she says. Then leans down and kisses me full on the lips, deeply, not like any other kiss she has ever given me. She even gives my rehardening cock a little squeeze. "Let me show you how to use this."

I look over at Robyn who just nods at me. We all get up and head upstairs. Halfway up the stairs, Robyn whispers in my ear, "It's OK, I did this too." I feel like I've been caught at school and I'm going to the principals office. I'm nervous too, and nearly fall down the stairs when Robyn gooses me from behind.

When we reach my parents bedroom, Mom drops her robe and turns around. She pirouettes around and shows me her entire body. Then she has Robyn pull off her negligee and panties and stand next to her. Robyn is almost as tall as Mom. They're both about 5'7 or so. Otherwise, they are quite a contrast. Mom a brunette and darker complexion, while Robyn is blond and pale. Mom is 39 and has had two kids, but she's still incredible. She swims regularly and watches what she eats. Things have sagged a bit, but damn. Totally a MILF. I think that is exactly what she has in mind.

My cock is standing at full attention, sticking out of my robe. my mom comes over, pushes my robe off my shoulders, and pulls me to the bed by my cock. Robyn and Mom sit cross-legged on the bed side by side while I sit at the foot facing them. I am staring at her hairy bush split by her wide spread pussy.

Mom asks Robyn, "So what have you done together?"

Robyn smiles "Not much, hand jobs, a little finger fucking and oral. He's really good at oral." She grins at that last item.

Mom leans forward and pats my knee, "He's always been a fast learner. No fucking then?" Mom asks.

"No, I was waiting for his birthday, too," Robyn replies.

I'm not sure what to make of this. My birthday is in a few weeks, but I hope I don't have to wait that long. In the mean time, I start stroking my cock.

Mom notices and reaches over and starts stroking it for me. I nearly jump as I feel her firm, but gently touch. She says, "How about a little show and tell?" She leans back and spreads her legs wide. Her pussy is covered in dark curly hair and isn't trimmed like Robyn's.

"My goal today," Mom says, going into teacher mode, she used to be a "Home Science" teacher in New Zealand before she married Dad, "is to give you a good lesson in human anatomy and sexuality." She points out various points of interest: "The whole area is called the Vulva or Pussy," rubbing her hand over it, running her fingers thru its hair. "Now there are a lot of slang words for all of these parts, but I want you to learn the proper scientific names, too. The outer lips are called the Labia Majora, and the inner lips are the Labia Minora." Mom pauses for a moment. "Robyn, why don't you lie back so Edward can see you and compare."

Robyn leans back, grinning. I can see her pussy is much more petite, her lips don't protrude as much as mom's. I can also see that Robyn has shaved the hair from her outer lips. Robyn starts to stroke her little button, almost absentmindedly. Mom pulls her pussy apart and shows me her button, too. "This is the clitoris, or clit. Robyn is masturbating by rubbing hers. It's very sensitive, so, as you can see, Robyn is using her natural lubrication from her vagina."

Mom slides her fingers down and pulls open her pussy. She points out a little hole about halfway between her clit and vagina, "This is the urethra, which how a woman urinates." I make a face, so she adds with a smirk "At least I won't be asking you to suck on in, the way that men expect their women to suck their cocks!"

"And this," she says, sliding one finger inside, "is the Vagina or Cunt, but that is such a nasty word. As you can see, I'm getting excited just like Robyn. Here, feel how wet I am getting." I reach forward and slide my finger slowly inside as my mother moans. "Oh, yes dear." She takes my finger, slides it up to her clit, and begins to rub it using my finger. "Oh yes, that feels so good. Can you continue like that?"

I can and I do. Mom begins to moan as I tickle her clit. She reaches up, starts to pinch her nipples, and moans a little louder. I lean in to get a good look, glancing over at Robyn who is madly fingering herself, too. I can smell Mom's cunt a little now. Its not bad, but funkier than Robyn's. Mom moans "Lick it."

Moving my finger, I lean forward and lick my mother's clit. She lets out a loud groan and grabs my head with both hands, entwining her fingers in my hair. I kept licking and licking until my tongue got tired. Mom was going wild, as I slowed down she moaned "Suck it," so I did. It was like almost like little penis and I felt it grow between my lips as Mom begins to she scream and buck and grind my head into her crotch. Finally she pushed me away, and let out a long sigh, then "Wow, you are a natural."

"I told you Mom, even better than Dad," Robyn adds.

"I'm sure you are in need of attention, son," my mother commented. "Switch places with Robyn and let me get a good look at you."

I do, leaning back next to my mom, who as sat up, inspecting me. My cock is so hard it wants to explode. It is pointing straight up to the ceiling as I glance back and forth between it, my sister and my mom.

"Now, this is your penis." Mom gently grabs it. "It looks like it is already a good 6 inches, Edward. I see you are taking after my side of the family there. Your Granddad's is a good 9 inches erect." She strokes me gently, but firmly. "The head of the penis is called the Glans and this is the shaft," she said as she stroked me. "I rather regret that we had you circumcised, but its too late now to do anything. The foreskin protects the glans, and keeps it much more sensitive, or so I've been told, "

She reaches under my cock and cups my balls. "These are the Testicles or Testes, also known as balls, and they are held in the Scrotum. You boys are somewhat simpler than us girls are. I have plenty of books with much more detail and information. I want you to read all about it when we are done here today."

Mom leans over and swirls her tongue around the head of my cock as she fondles my balls with one hand and strokes the shaft with the other. She then sucks me deep into her mouth and strokes me with her hand and mouth together. It feels so good, she's much better than Robyn. I start to moan. Mom speeds up, looking up at me with a wanton lust in her eyes. I almost jump off the bed as she lets go of my balls and slides one wet finger up my ass. I cum harder than I every have, grunting with each spurt. Mom swallows it all grinning.

She pulls back as the last few spurts dribble out of my cock over her hand that slowly milks my still hard cock. "This is semen, which contains sperm," the lecture continues. "The man's sperm penetrates a woman's egg to form an embryo, which grows into a fetus and then a baby when it's born." She lifts up her hand and licks it clean, then leans down and licks my cock clean, too.

"I wanted you to ejaculate first, because I want you to last a good long time, next. After a man cums, it usually takes him longer to cum a second time." She pauses then looks at me. "Hmm, I really should stop and ask you a question. , 'Do you want to learn sexual intercourse, or do you want to wait?" I must look confused again. "Do you want to fuck now, or do you want to wait until you find a nice girl and get married?"

"Now" is all I say, grinning.

"I thought so, but I wanted to ask. So, me or Robyn?"

"Both."

Mom and Robyn both laugh. "How about Robyn first, then me, Edward, OK?"

"Sure."

"You are a man of few words today, aren't you?" Mom laughs again.

Robyn and Mom change places. "First go down on Robyn and get her all wet," Mom suggests.

Robyn is plenty wet, but she leans back and moans as I tongue her. She cums at least twice before my mom taps me on the should and I come up for air. Robyn spreads her legs wide. "Now, kneel here." Mom advises, "And slide your cock up and down her slit to get it well lubricated, then slowly slide it in."

It feels like a wet warm vise. Robyn moans as I penetrate her, losing my virginity to my own sister. It feels so much better than oral with her or even my mom. I pull out slowly until my head is almost out, then back in again, faster. Robyn wraps her legs around me, pulling me into her. I pick up the pace as Robyn begins to move with me, rising up as I slam down into her, harder and faster on each stroke. Robyn begins to moan loader and loader as I grunt on each slamming stroke. I am getting close as Robyn lets out one long hard squeal, cumming hard. I feel her cunt ripple around my cock and I slam hard into her one last time and cum, too. I grind my cock into her cunt as we both spasm together. I am oblivious to everything else, just cumming and cumming and cumming. At last I collapse on top of her, gasping for breath. Robyn gasps for breath under me, trying to recover. I don't want move, my cock still impaling her as I still hump her slowly.

Finally, Robyn lowers her legs and begins to squirm beneath me. I notice I am getting a little cold as my sweat dries and I roll off beside her. I reach for her and we kiss. "You're a natural at that, too, little brother," she says.

My mom reaches over and squeezes my now limp, wet, oozing cock. She starts to suck it into her warm mouth, but something snaps inside me. I buck her off me and run into my room slamming my door. I fall into bed crying.

My sister, my mother, my dad and now me? What is wrong with this family? And how come I never even noticed?

A few minutes later, there's a knock at my door. "Edward," my mom says, "can I come in?" I don't answer. "I'm coming in. We need to talk." She opens the door and comes in. She's wearing her robe and looks worried. I pull myself together and stop crying. I feel like such a baby crying in front of her.

Mom sits on the bed and I cover myself with my sheets. She puts her hand on my shoulder and says "This must be a lot for you, all of a sudden." I nod. "You and Robyn caught your father and I off guard this morning. We were planning on introducing you to all of this slowly, starting on you birthday next month. I'm so sorry if it's been too much, too fast today."

She leans down and kisses me on the forehead, like a mother should. This time, I can't see down her robe. "It'll be ok. We'll go at a pace you can handle. Just remember, we all love you and never want to hurt you." Then she kisses me again, full on the lips for a long, very unmotherly kiss. She gets up and leaves as I begin to get hard again. God, this is so confusing.