My GF’s sister is an attractive girl and have always thought so. I’ve caught myself staring a few times in the past but she has a BF now so….. She wore a tight little black dress with stockings to Xmas today and for some reason I found her sexier than usual. Maybe it was cause she was constantly adjusting her dress down so it didn’t ride up too much. At one point she went to sit down on her BF’s lap and it rode up quite a bit. Her sisters both pointed it out and said something and unconsciously I looked at what they were talking about. I didn’t see anything but she caught me looking at her and got mad at me. That turned me on even more thinking about what could have been. Even though I feel bad, part of me wanted to see some ass/panties. Made me even think briefly about what it might be like pulling her dress up and taking her from behind. This is the first time I have got horny over my GF’s sister and I feel bad but enjoyed it at the same time.
Source: reddit.com/r/gonewildstories/comments/rp1mds/gfs_sister_lookes_sexy_in_lbd
I totally get it. My sister-in-law has a sexual Instagram so I look at her when we are at family events. I always imagine making her cum.