Convince my cousins to fuck at a party

He couldn't help it, he knew he was everyone's favorite cousin, that's why he knew that if he wanted to fulfill that perverse fantasy there was only one way and some people willing to do it, his cousins. He had invited them to a party, one like others they had been to together, only it would be something different because he had made an agreement with his friends so that at the right moment they would all let their virile members out and offer the girls the fuck of their lives. When the time came and thanks to the drinks served before, none of them put up any resistance, just wishing to make him happy.