( M19 ) Turned being Toxic into a fantasy

Background – this was an Era where I felt and was Ruthless understand I was with this one girl dated her until she showed me a streak with her and this other girl and I asked who that was cause I know all her friends, She showed me a full body picture of this girl I said She thickkk asf, Turns out they were bsf and she got mad at me for saying it but i played it off as a Joke. I kept dropping the idea of a threesome as a joke but slowly got more serious about it. She constantly refused till one day she said fuck it and said whatever and sent me her bsf @. me and her start talking even tho my girl was pissed abt it, Sooner or later after a few links tg Her bsf got obsessed and wanted to fuck. She wasn’t expecting this to happen cause her bsf is detached but she didn’t know her bsf is a slut for my veins. Once during a link together her bsf went ahead nd wrapped herself around my arm and while my girl wasn’t looking took my hand and started touching herself, We were all chilling on the couch so I pretended I was sleep. Story for another time.