I (25m) have been dating my gf (25f) for 4 years. When we started dating her sister (22f) was kind of quirky and strange. In the last few years she’s really glowen up. She started working out and doing herself up more and really looks good. Over the past year, the way she acts around me has changed a bit. She’s been a bit more touchy and open about sexual conversations. I can’t stop playing out a scenario in my head where we hook up in the heat of the moment.

Maybe this isn’t the best way to deal with this but I jerk off to the sister to help keep my thoughts at bay. Idk if she’s actually interest or not, or she’s just connecting with me more at a friend level. But I’m trying my best not to find out. We all party together so I’m afraid something might happen one of these days and I don’t want to cheat or be the reason two sisters possibly ruin their relationship with each other.

At the moment my fantasies are running crazy with different scenarios of her sister and I hooking up and they don’t seem like they stop any time soon…