My story started way before but can’t tell cause of the rules but it restarted recently.

My sister recently moved in with me cause of her job. She didn’t wanted to move in back with my parents so I ask her to move in since I had a spare room. She wasn’t with someone/dating nor did I. So we were living our lives normally until one day after I saw her running out of the bathroom naked to her room unknowingly I was in the house and I saw her. I told her a few hours later that I was at home and that I saw her running to her room. She was really embarrassed…. But couldn’t resist, I kept staring at her sexually and imagining her naked again.

The next time she showered, she went towards me with her towel and she let a slit open. I was blown away, I could see her half naked and especially I could see her pussy. It turn on so much that I think she saw my boner.

From then I notice her attitude changing. She began to tease me more often, masturbating with her door open. Obviously, I would watch and touch myself. I even began filming her and put a spy cam in her room watching her change and masturbating. I started to leave my door open when I would masturbate or fucking a girl and I know that she would be watching me. So I started to be louder every time a girl comes over. Fuck we harder everytime so she would hear us

One night, we went to a family party and we arrived home drunk. We started to talk and ended up on the discussion of me seeing her naked and spying on her. Next thing lead to another and she was blowing me and I was fingering her on the sofa. We moved it to the room and we started to fuck. From that day we fuck each other at least 2-3x a month or more.

She gets turn on so much when I take pics or film her while fucking her inner sluts comes out. Ever since she caught me filming her the sex has been even more crazier at the point she lets her bf film her and sends it to me to get jealous/punish her later.