My mother moved in with her new boyfriend and he brought his boy with him, who is now my stepbrother…alright. Anyway, I’m in the bathroom and put lotion on until I noticed him observing me through the door gap. Caught! Well, I asked him what this is supposed to be and he begins to stutter that he likes big tits and therefore wanted to look. Well his insecurity turned me on and then somehow one thing came to another and we were fucking until he couldn’t stop himself and came in my pussy.