Man plays with the siblings
A beautiful sister finds a stunning man and starts a relationship with him. She especially loves the sexual aspect of the relationship - he plays her body like a finely tuned instrument, knowing all the right places to work with ginormous cock. In another part of town, her brother who recently came out of the closet and a long-term relationship, also finds an equally handsome guy who does his ass like no other man ever did.
They have no idea that they are both dating and sleeping with the same man.