Sure she does!

Elizabeth found herself unable to simply leave the room. She didn’t know what she was supposed to do as she watched Mistress M look over the sacrifice that she had brought. But Eric didn’t fight or resist or question what was going on. He just took to it like a fish to water. They were twins after all so it wasn’t that much of a surprise really: if one could be controlled and manipulated by a closet dominatrix then the other one should to.

And that’s how Eric ended up naked at the front of an empty class, with Mistress M measuring his erect dick out to be 7 inches from base to tip. “It will suffice” Mistress M said. Not to Elizabeth, though Elizabeth felt it was directed at her, but to the room in general. It did not come out of the package erect, Mistress M had to work it to get it up. That was when Eric started to realize what was happening. It wasn’t when he got naked, or when Mistress M thanked Elizabeth, or when Mistress M has Eric start calling her Mistress M, it was when Mistress M started to suck his cock to get it up. It was floppy and soft out of the box: it took some effort to get it up.

So Mistress M climbed up on the desk and hiked her dress up a bit. Her legs came apart and she instructed Eric to walk up in between them: he was not to leave until she was satisfied. But there was a catch: Elizabeth had chosen a virgin. Eric had never actually done this before: in fact he had never gone beyond first base. He had a few girls, a few make out sessions, maybe one or two involving Elizabeth when they went to a party and there was some “innocent” high school drinking, but nothing beyond that. And now he was hitting a grand slam all in one session! So of course there was some… malfunction. While at first it was fully erect it was now… somewhere in between.

“Oh crap.” Mistress M barked out as she started to stroke his up again. She looked up at Eric, stared straight into his eyes, “take your time. Don’t think about it.”

Now it was back up, and this time Mistress M put it up in her.

She was always fascinated about the structure of the vagina: after all it’s a series of two thick lips that black the actual hole, that gets hot and wet to find easier, but when you go into the hole you almost have to make a u turn around the pelvic wall. Yet somehow it all fits together and the guy doesn’t have to put his penis at a weird 45 degree angle to have a good time. Well it was possible to put it at a weird 45 degree angle but that was only if you wanted to do that and in her experience that was a bad idea.

And now that Eric was up in her they could share in that pleasurable violation of her vaginal cavity.

All the while Elizabeth watched from the doorway, not sure if she should leave or not. She got to watch the de-virginization of her brother by her teacher in a very cfnm sort of way. She had heard of that type of porn but had never watched it. Now she was. She was watching as Mistress M really put her body into it as Eric found he was around her cunt, as he felt her up through her cloths (he was a little too timid to just strip her naked, feeling he had to ask for permission). And Elizabeth looked on as Eric couldn’t quit finish his first time, but Mistress M at least got a cock up inside of her for a time.

“Elizabeth?” Mistress M said.

Elizabeth slowly scooted forward to the desk.

"First off we should help him get off. Second off while I enjoy your attempt we should get a better representative of the human male --"

"--Hey!" Eric tried to say but Mistress M put a finger up on his mouth to silence him.

"And also... are you turned on?"

Elizabeth realized that she had undone her pants and had a hand rubbing her clit.

"OK, homework time." Mistress M got her cloths back on straight.