When he told her to bring her little sister over on her 18th birthday she had hesitated for a moment, because she knew he’d be fucking her brains out. However, she knew that her sister had wanted his cock ever since they started dating, so it wasn’t fair to either of them to deny him. Her little sister licked his balls while she sucked his cock to start things out. She knew she’d be licking his balls while he fucked her little sister’s ass by the time the night was over.