Caught as a girl quietly masturbates near his sister and offered sex as the best alternative to the jerk

The girl started and went into the room where her best friend was already sleeping. I thought that while the girlfriend was sleeping, she could unload the tension with masturbation and no one would even know. But in order not to wake the girl, she decided not to close the doors to the end, since they creak a little. She lay down on the bed nearby, spread her legs and began to enjoy her right hand. But the girl did not suspect that her brother of her best friend could catch her, even if she masturbated super quietly. And so it happened, the guy shut up her mouth and offered sex instead of a boring jerk.