AITA for possibly sleeping with a girl who has a boyfriend

Girl has a boyfriend but still wants to f***

For Sleeping with a girl who has a boyfriend

Ok some background information, it hasn’t happened yet and I have asked multiple people but I feel like a third party opinion would be great.

Ok so im not gonna say her name for obvious reasons, at the beginning of the year we flirted off like there was no tomorrow however it got to the point were she started sending me photos of herself and I sort of lost interest for a while, I haven’t talked to her in quite a bit until recently, and with all of this disease (that shall be not named since this post was auto deleted before) stuff going I stopped caring about it and hit her up again. She was still really good and we started flirting again and then it got to the point were she started sending photos of herself again, so I just said that I cant wait to hang but then she says that she has a boyfriend but it doesnt matter to her, It doesn’t help that this is gonna be my first time and for anyone questioning it she is very fiiiiiine but I feel sort of scummy if I go through with it. This will most likely be my first time doing this on reddit but after watching Cuestar I feel like there can be some helpful answers, thanks for even reading up untill this point so peace.

Edit:After everything and thinking about it more you guys were right, and I appreciate every response thanks.