What the fuck are you doing, stepsister??

I've always been a hurt in the ass for my stepbrother. Never ever missed a single chance to annoy him or make him mad. I did it because I've always been attracted to him and there was no way my secret desires could ever become real. But one day I decided to give a shot. Our parents were not at home and I knew that he will be taking a bath in the evening after a tough day. That was my lucky chance to seduce him. Will I finally get what I want?