Ex begged for sex, gave in, unsure what to do

For context, my ex (F) and I (F) dated for about 2 years, she’s now into men and we broke up almost 2 years ago but we are still best friends despite everything that’s happened, we hung out like we typically do, another friend of mine was there and had some psychedelics of sorts, they both did it and I stayed sober, me and my ex have never had any sort of romance since we broke up and are just aware that we are best friends, I’m in love with someone and plan to ask them out very soon, and she had just broken up with her boyfriend because he was controlling, I’m a decently well off girl and have a nice looking body, my friend always complements me on it and my ex was noticing it a lot while impaired and kept touching my body for fun because I have a lot to squeeze and have fun with, this lead to her begging to have sex just absolutely begging “just this once” because she thinks she still likes girls and she said her boyfriend was unable to make her orgasm, I kept denying her request, but all she was thinking about for the three hours that she begged was having sex, she said she was not going to give up, she begged me not to get into a relationship and said we could have sex because I’m still single, I told her I am very much in love, but about 3 hours into her begging and touching and trying to kiss me I told her if she gave me some money I’d do it, she was still very much under the influence, and I told her she would probably regret it in the morning, again she is one of my best friends and we have been through so much together, we went to my room and I told her to just say the word and we could get started, there were a few instances where she got scared because my cat meowed and I had to explain to her what a cat was, eventually we got to the point where we were making out and I was touching her and she was enjoying it, it was decent sex, but I wouldn’t do it again, it had no meaning to me really as I do love someone and I am waiting for the right time to ask her out, and it didn’t mean anything to her either as she is now back with her boyfriend again, but she was absolutely begging and I could give her something that her boyfriend was unable to, now I love her I really do, but not in that kind of way, and what happened honestly messed with my head because her boyfriend came to pick her up and we all hung out and everyone was treating me strangely, and she isn’t really talking to me, for a fact both my ex and my friend are treating me weird and while she was begging my friend even told me to just do it so she would stop asking and we could all have fun, but in a weird way this is all messing with my head because I don’t want to lose a good friend over something stupid that she wanted in the first place, it was consensual and she was not ashamed of it when she was sobered up, she only started acting weird and not speaking to me when she got back with her boyfriend and he came to pick her up, and the way she was acting and things she was saying honestly hurt my feelings a little, does anyone have advice? I’m not sure how to bring it up to her and make sure me doing something that she begged me to do for 3 hours straight didn’t ruin our friendship