Amy wants both of them at once...

After a lot of thinking (which, for a drunk, was about 3 seconds) Amy decided to try something.
"Guys, i want to try this, OK? Just once... I want you both to shoot over my back."
"wha... fuck, explain that?" asked a confused Joel
"I take off my top, you both beat off at the same time and make it hit my back." seeing non-comprehensive stares coming back at her, she tried again. "I lie here on the couch and you both jerk off and shoot off onto my bare back." whoah, thought Joel. Do I want my girlfriend covered in my best friend's jizz? He thought about it. Amy looking at him jerking off at her with another guy doing it as well WAS pretty fucking erotic. He wanted to see her used for Mik's pleasure, to see his pretty girlfriend being a slut for him. He couldn't pick why, but the idea just got him off.
"Ok, I'm down for this, Mik?" Mik had been sitting on the couch hoping that they would forget the idea. it wasn't that it didn't appeal to him, but it made his guts churn sick in nervous excitement. Amy leant over to Joel and whispered for a minute. Amy turned to face him.
"Mik, we've decided that we want to share my body with you. i want to see my body covered in someone else's cum. We not asking for a bisexual threesome,"
"Shit no, no offense, man!" joel blurted. Amy looked pissed off that he interupted.
"we just want you to use my body for pleasure"