Four Girls at a time

Considering there were so much girls, Isaac split them into three groups of four. He then told them to strip naked.

He made his way to the first group and started with a tall blonde with nice tits.

"What's your name?"

"Amy."

"Amy, you need to be fucked up the ass at least once a week. It will help tone up your buttcheeks."

"Got it."she said.

"Also, you must masturbate until orgasm every night before bed, to release any sexual tension you may have built through the day."

"Okay."said Amy.

Next was a brunette girl. Her name was Valerie. Isaac wanted some fun with at least four of the girls, so he figured Valerie was a good place to start.

"Valerie,"he said. "You need to be my sexy assistant."

"Why?"she asked.

"Because, uh, I am offering some extra credit that will go on your permanent record. All you have to do is be my sexy personal assistant."

"Oh,"said Valerie. "Um, sure. Why not? I'll be your assistant, sir."

Isaac chuckled and moved on to the next girl in the group, a short brunette, whose name was Kaitlyn.

"Kaitlyn, from now on, you need to be as submissive to any guy you date as possible. You need to please your man sexually or otherwise. If you don't, he may break up with you."

"Okay."

Now on to the last girl. A short blonde with a nice ass. Her name was Heather.

"Heather, you are a bisexual. You love getting fucked by both men and women. If you have a boyfriend, demand a threeway. Do not take no for an answer. Also, speak like a stereotypical blonde bimbo from now on, okay?"

"Like, okay."she giggled.

"Good. Now, Amy, Kaitlyn and Heather, make out. Valerie, your job as my assistant starts now, so come with me to deal with your other sisters."

"Yes, sir." Valerie said.