Rent.

My wife’s sister is living with us, again. I’ve never put my foot down on her living with us, even though I never wanted her here. She’s had her problems over the years, marital and others. This time around is different, though.

Three days after she moved in, she wanted to “thank” me for letting her move in again. I had told her “it’s no problem” and brushed it off. But to my surprise, she got on her knees in front of me and started reaching to undo my pants. She “insisted.” I stopped her at first, feeling pretty shocked and unsure of what to do. I knew I shouldn’t, but I also knew I wanted it. Although I had never thought of trying anything, she’s admittedly a very attractive woman and I’d definitely checked her out plenty over the years.

Well, I caved. I undid my pants, got my cock out, and she didn’t waste any time getting to work.

This became a regular thing, at first with her asking if I wanted it, and then my just telling her when I wanted it. Eventually I started fucking her, and we haven’t stopped the arrangement since.

I do feel bad, as I should. But it’s also a huge help. My wife and I just aren’t as active as we used to be, for various reasons, and having the extra outlet has really helped hold me over during the down times.