The Helpful Step-Daughter

my step-dad really is nice, he comes in every night to check in on me every night. When he became single again I stayed with him and started doing the same thing for him. I even would use his hand while he was so comfortable to masturbate. My step-dad is a bigger guy. I worry he wont find anyone so I want to make sure he gets off. a man that doesn’t clear the pipes enough can become frustrated and such or at least that’s what I have heard. I started sucking and trying to have him fuck me, I’m so small and he is so big, its fun.