Sneaking around with my step bro

My mom just married a new guy, he has 2 sons. Everyone thinks I am the innocent, prude, nerd but that's far from the truth. My new step bro didn't know I was in the shower and popped in to use the bathroom, startled he didn't think it was a good idea to stay...but I can be VERY persuasive Things get hot and heavy and a little dicey when our other sibling comes home!