Lesbian gf hooked up with a guy while we were broken up

me and my ex-girlfriend just got back together. We dated for about a year and a half before I broke up with her. She identifies as a lesbian and so do I. I have hooked up with guys in the past before meeting her. But I realize I was a lesbian as I didn’t enjoy any part of being with a man. my girlfriend has a lot of religious trauma, and she struggles with internalized homophobia. I broke up with her because I didn’t feel supported in the relationship and we had a lot of arguments and issues pretty constantly. I didn’t feel as if she was treating me well in comparison to how I was treating her. while we broke up, I broke up with her through a voice memo, and I was kind of tired of being in a relationship I wasn’t happy in. But I loved her very much. this hurt her a lot and she was going crazy. When we broke up, i didn’t move on with anyone else and I took a lot of time to myself. I found out that she was on hinge three weeks after we had broken up. I texted her about it because it felt disrespectful.We started talking and catching up. She said she was on hinge trying to distract herself because she was so heartbroken over me. We got back together for about 2 months and the entire relationship was perfect. She treated me better than ever, and I was truly happy. but, we were drunk one night and she told me she had sex with a guy while we were broken up. This broke me because she never let me know beforehand, and she projected a lot on me during the relationships that I would leave her for a man or that I was attracted to men. She also told me during a really bad time in my life, but she really didn’t mean to say it at that time. She had just been confused on when the best time was to tell me. I am still dating her because the relationship really has been better than ever. She’s extremely mature and has been communicating better than ever and supporting me. But of course, I am very hurt by what happened. I know it technically doesn’t matter because we were broken up but the lying, projection, and just the fact that she didn’t move on so quickly truly hurts. She said she hated every second of it and thought about me the whole time. she even texted her friends after saying it was a terrible experience and she’s very gay. she said she was doing it to fully accept that she was a lesbian as she found it hard due to her religious trauma. I am a lot of her first everything. I’m trying to learn how to find acceptance with it and I’m not sure how to deal with it. But it would be nice to have this work out with her. She is very sweet and kind, but definitely makes stupid mistakes and I believe it all goes back to her religious trauma of her being in a cult.

I know she loves me more than anything else and I know she did this out of a place of hurt. My mom had been diagnosed with cancer around that time and she has helped me through everything. She’s been there for me more than anyone else in my life has been. That is exactly why everything feels so difficult because everything is perfect except for the fact that that happened

any advice?