My friend has been lying about that she’s still messing with my other friend should I be mad or no?

My friends had a previous relationship and it was going pretty well but it started to get worse, eventually they ended things badly but since I’m both their friend they would tell me stuff about their issues, I kept what they said to myself as well. But to stay on topic my male friend ended things and my female friend told me and I suggested that it was finally time to start focusing on self love and maybe talking to a few other people, since we all were friends before they dated they went back to being friends but it really wasn’t the same, my friend was still dealing with issues that made it seem like they were still a thing but my male friend was in a relationship a bit after. My female friend tells me how she didn’t want him touching her and how she felt played so I thought she was done with him for good. I’d tell her how she seemed to be doing better but recently I was talking with my male friend and he said something that made me ask if they were having sex and he said they have for a minute now (he broke up with his previous girlfriend at this time.) I was thinking all the times she complained about him to me and was crying about how she was still feeling used by him she was still having sex with him and my male friend was surprised I didn’t know since she told me everything. I know her sexual activities are not my business but she made it seem like she wanted no type of sexual contact with him especially since they aren’t dating and she tells me literally everything even her sexual encounters. I always have been there to support her and give her tough love. I didn’t address it to her cause I don’t think it’s my place but I feel like she’s setting herself up to get hurt by someone who doesn’t plan to rekindle their relationship. I feel like It’s nothing to hide because I’m understanding but still I feel like she needs to learn the hard way now.

My friend has been lying about that she’s still messing with my other friend should I be mad or no?
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