I've been fucking my niece for about 6 months now. I'm happily married, and enjoy a decent sex life with my wife. I didn't need to go out and cheat. Hell, I didn't seek it out.

She had been teasing me for quite some time, even more after she noticed me checking her out. One day while they were here and everyone else was asleep, she took it a bit too far, and I basically told her she needed to stop, "or else". When she asked me "or what? What are you going to do about it?" I told her "maybe I'll give you what you deserve for teasing me all the time."

She kind of laughed and told me I wouldn't dare do that, and she sat up on our kitchen table, with her legs opened enough for me to see her black panties under her skirt. I had had about enough.

I wound up pushing her onto her back and fucking her hard and rough. I could tell I was giving her exactly what she wanted, and I was in heaven. It was rough. I had my hand on her throat for a while. I wound up pulling out and cumming on her stomach, and then made her clean off my cock with her mouth.

Ever since that night she's been my little slut. It's mostly rough, but every once in a while we'll mix in a good, passionate fuck with a lot of kissing, which somehow feels so much more dirty at times.