WHAT DOES FUCK STEPBROTHER MEAN?

I realize its stupid of me but i feel in-sufficient. I am not small, it's about 7 three/4 to eight". Can it be Silly of me to worry that she'll want one thing greater? It Practically appears to be selfish of me to believe that way about her when I know she enjoys me and only me, but I suppose its just the male ego elaborate. Any guidance?With porno