Twin sex

"Getting twins in here is such an oddity, I want to see something I've never seen," Grant says. "I want you and your brother to have sex right here in this room. If he will creampie you while I watch, I'll make you both Alphas, and I'll throw in a complimentary breast enhancement surgery at my private clinic."

"You want us to...thats gross."

"I spend all day every day looking at naked 18 year olds, deciding their futures based primarily on cock size and breast size," he says. "As you can see, we sorters have some...discretion when it comes to making our selections."

"But he is my brother!"

"I've seen and done it all, Marcie," Dr. Grant says. "I've had straight guys suck me off to be upgraded from Beta to Alpha. I accidentally impregnated a very religious Gamma virgin in the exam room next door just to move her up to Beta. I've never got to watch twins fuck. Thats worth it to me. Thats a new experience."

Your sister turns and looks at you, uncertainly.

"Derek?" she asks. "Do you think..."