Am I Wrong? Update bestfriend boyfriend tried to pay me for sex

Backstory: Few weeks ago my best-friends boyfriend was texting me saying how bad he wants to fuck me and he will pay me and also pay me not to tell my best friend. I told him absolutely not and called her immediately. Since I told her she hasn't called or text me until one night she told me she chose to stay with him which I didn't like but I can't control that. Few days later I notice I'm blocked from her social media. Didn't say anything just waited it out to see if she would text me but she didn't. My sister just called me and told me she has been posting pictures with him going everywhere & posting things like she needs real friends.