Fucked My Girl's Sister

I have not fully moved in to my girl's place but I am over there 6 to 7 nights a week and all my stuff is there basically. During this summer my girls sister got a job with her friends and my girls place is closer to both of those vs their parents home. So lately she has been staying over more and more and clashing on the couch. We get into small fights cause she always leaves the couch messy or her personal items on the floor or in the bathroom. There is not hate but we don't get along.

This last Monday night the little sister found out a friend from her high school lived near by. The plan was for her to stay the night with them. So the GF and I planned on fuckin'. I had my GF on her back one leg up on my shoulder and I look up at the door and there is her lil sis! The top of my GF’s head was aimed towards the door so she couldn't see what i could. A little later, I look up again she is still there so I thrust harder and smile. I cum so hard my GF said she felt it pulse & shoot. Her sis quickly & quietly steps away. Kind of awkward the next two days... no eye contact... one word replies... things like that.

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My GF had a rough day at work on Wednesday, came home and started drinking, went to bed early. I notice the sister laying on the couch with yoga shorts and crop tee. I sit on the couch telling her it’s not nice to spy. She blushed and put her head down into her phone. I asked if she like it, I had a few drinks and was being direct, she said yes. I put my hand on her leg...She came at me like a wild animal started making out with me! Been a long time since I had a make out session. She starts rubbing my cock thru my pj pants. She lays down on the couch opens her legs and gives me the nod. I pull her tight shorts down and off. Kiss her ankles and pull my pj pants down to my hips. Lined my cock up to her little mound. Gods she was so fucking wet. I forgot how wet young pussy was. She...was...so...tight! I took it slow even thought I wanted to go faster. I asked her if she liked my cock... asked her if it was better then the boys from her school. She said Yes! I was fully in and I went deeper and picked up the pace all while I made eye contact. She started contracting around my cock and cumming!
Felt...
Wild...
I started to thrust hard and leaned down to kiss her to muffle her moans. She wrapped her legs around my ass and out of no where called me daddy! I didn’t last long after that. The rush + thrill + risk + how tight she was + her calling me daddy... I came! I shot 7 times, deep powerful shots! She said she was cumming again! I could feel her contracting around my cock, gripping me from inside. I ask if she is on BC... she smiled and nodded. I told her that was fucking amazing! Kissed her while my cock literally popped out and she went to the bathroom to pee. I wasn't sure if I should stay or not, I ended up just going to the bedroom before she came back.

This morning she is talking to me in full sentences and playfully pushing me. My GF said it’s good you two are getting along better.