"Good morning, class!" Mom greeted us cheerfully as my twin sister and I stepped into the classroom early the next morning. We set our textbooks down in the little metal baskets under our seats and waited attentively for Mom to get started on the day's lessons.
"I take it everyone had time to do their homework for sex ed last night?" Mom asked. The day before, she had assigned us both the task of trimming the hair from around our genital regions. You know, to make things cleaner and easier to see, for educational purposes.
"I did!" Julia's hand shot up proudly. "It looks really cute," she added, glancing over at me briefly.
"Great! Robert?" Mom turned to me.
"Yep, got it done. Number 1 guard," I reported dutifully.
"Oh," Julia said. "I forgot to put the guard on," she confessed.
"That's okay, honey," Mom reassured her. "You didn't cut yourself did you? It's a really sensitive area." her eyebrows went up a little bit from concern.
"Nope!" Julia exclaimed proudly. "I even got, like, in between? Inside? I dunno how to explain it."
"Oh, you mean in between your outer labia?" Mom asked.
"Uhm... I think so? Maybe?" Julia wasn't sure about the terminology.
"Honey, your outer labia is... maybe it'd be easier just to show you. Do you guys mind another field trip?"
We told our teacher we didn't mind.
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"Robert, can you grab a towel from my bathroom and meet us in the living room?" Mom asked me as we made our way out of the classroom. Mom's bathroom is all the way upstairs, but that was where all the biggest, fluffiest, most luxurious towels were kept. The older ones were kept in the other three full-size bathrooms in our relatively large house. But why was I grabbing a towel?
By the time I got to the living room with a large white towel under my arm, Mom and Julia were mid-conversation:
"I guess it'd be easiest," Mom was saying, "If I show you two --- oh, thanks, Robert," she said, noticing me. "Just lay the towel down on the floor. Fold it once, long-ways," she instructed and I obeyed, folding the towel once over its long axis, laying it down flat in a strip on the carpeted floor. But still, what was it for?
"Okay, so like I was saying. I think it'd be easiest if we both look, together, at our vaginas. That way your brother can at least see two separate examples. Most men's penises are essentially the same, except for size," Mom quickly glanced over at my groin and then looked back at Julia. "The same thing isn't quite true about women's vaginas. You guys don't mind seeing a little more of your old mom than usual, right?" We told her that didn't bother us. Why would it? She was our mom, not some strange woman.
"Okay, great. Julia, how about we both just take all of our clothes off?" Mom suggested.
"That does seem easier," Julia agreed, and she began to pull her shirt off over her head. She wasn't wearing a bra, and her enormous breasts made a slapping noise when they fell back down to her torso. For a moment they partially flattened against her before they regained their full shape, her pink nipples facing almost perfectly forward.
Mom pulled her shirt off as well, but despite her having slightly smaller breasts than Julia, she was wearing a bra. She did like to keep it professional - she was our teacher, after all.
My penis was already hard as I watched my mom and sister undress. I looked between the two of them, and although my sister was clearly more attractive to me, Mom was still extremely attractive as well. While her breasts were not quite as large as her daughters, her hips and ass were a bit more pronounced. None of us were heavy or overweight, but Mom was the largest.
"Oh wow, you really didn't use the guard did you," Mom remarked, looking down at her daughter's bare vagina once they were both fully naked.
"I know, I know, I forgot! But it's okay, right?" Julia looked down at herself, and used her fingers to pull up on her outer labia, exposing more of the bare slit of her shaved vagina. If I wasn't fully hard yet, seeing this completed the job.
"Honey, it looks great. The only reason I said to use the guard was just so you wouldn't risk cutting yourself. It's actually better that you didn't use it. Robert, what do you think?" My mom and sister both looked over at me.
I felt a little awkward, fully clothed, standing in the living room with my mom and sister who were now both completely naked.
"It looks really nice, like really smooth," I said. I looked from Julia's over to Mom's vagina.
"But yours is really nice too, Mom," I told my mother. She beamed at me. Her vagina, at least while they were both standing up straight, looked just like Julia's, except with a little more hair. I would have guessed that Mom had given herself the "Number 1 guard" treatment last night as well.
"Okay, okay, let's get back on track here. Remember, we're at school right now," Mom said, rolling her eyes a little, but obviously still in very good spirits.
"Julia," Mom continued, "go ahead and sit down on that end of the towel, facing me," Mom instructed my sister, motioning with her hand to the end of the towel that was closer to Julia. "Sit down just like me," Mom said, settling down into a seated position at one end of the long towel, spreading her legs open evenly at about a 90 degree angle. Her legs were open pretty wide, but her vagina still appeared as only a clean slit of flesh underneath a short feathering of dark hair.
Julia sat down the same way a moment later, facing Mom. Her vagina looked the same as Mom's, but with no visible hair at all. At this point Mom leaned back a little, spreading her legs open only slightly father, bracing herself with her right arm against the floor behind her. Julia did roughly the same thing, though I'm not sure she was able to open her legs as wide as Mom could. I sat down next to them in a cross-legged position and watched them both closely. To my left was my sister, and to my right was my mother. With the way they were sitting with their legs splayed out in front of themselves, their feet were only a few inches away from touching each other. If Julia had opened her legs just a little bit wider, they probably would have touched at the toes.
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"Robert, you pay attention, too. This is just as important for you to know," Mom told me. I was still in a cross-legged position, sitting on the floor with Mom and Julia in front of me, Julia on the left and Mom on the right.
"Yes, Mom," I acknowledged her, straightening my back and observing closely.
"You can see, right?" Mom checked.