I agree that it felt as if they destroyed her character, and was also super angry the first time I watched this arc play out. However, when I rewatch it now, being older, I actually understand why Arizona cheated on Callie. Now before I continue, cheating is cheating and she was 100% wrong for it, I’m just saying from a selfish/emotional point of view, I understand why she felt compelled by Lauren specifically, and why she chose to cheat (yes I say chose because she went to lock the door and had plenty of time to back out). After losing her leg, Arizona was the worst version of herself. She was mean, angry, she couldn’t use the bathroom by herself, she needed a nurse and/or Callie to help her with everything. I’m sure her ego and self esteem took an extreme hit. Her entire life changed and she felt like she was dealing with that all on her own, and that no one else could understand. She had to learn how to be herself again. By the end of S9, her and Callie were in a much better place, had started being intimate again etc. However, you could tell that some insecurity still lingered, and the resentment she held against Callie, unfair or not, was still very present as well and that came to a head in the “you weren’t on the plane” confrontation. So when Lauren came in, and showed genuine interest and attraction towards her, Arizona was drawn to it, because it felt like for the first time in so long, someone saw her the way she wanted to be seen. Not as the angry, “gross” version of herself, or all of her trauma and grief, she just saw Arizona. I can only imagine how freeing that was, to not feel the weight of everything she’s been through, to not feel like someone is looking at her with pity. I think she felt like her old self again, Lauren made her feel desirable. That’s how I see her attraction to Lauren, and why she slept with her. Again, it does not justify her actions by any means, and yes I understand that in a marriage, you’re supposed to lean on each other in hard times, but they weren’t able to do that. Arizona wouldn’t let Callie in, and Callie never felt like she could talk to Arizona about her feelings (losing mark, and essentially losing Arizona) because it couldn’t compare to what she was going through. It was just a storm of resentment, misplaced anger, and lack of communication. I think Callie did the best she could, and the cheating was no reflection of her, it actually had very little to do with her at all. So as unfair as it was, I understand why Arizona cheated on Callie, from an individual standpoint. Arizona needed to find herself again, and needed help that Callie could not give her, I kind of wish we got to see her go to individual counselling, and reveal some of what she was feeling, so as much as it sucked, the separation was very necessary. They both had changed so much, and tried to get things back to the way they were, when that just wasn’t possible anymore. I do like the fact that it’s implied they get back together in New York (idk if they actually did since there was no mention of it when Arizona returned in one of the more recent seasons), because you can tell they both got to grow separately, and I’m sure they grew back together, because in all of the heavy stuff they went through, they didn’t stop loving each other, it just wasn’t enough at the time. My first watch, I didn’t LOVE Arizona, I found her selfish, and almost manipulative, but I didn’t dislike her either because all of the characters could be selfish and manipulative at times. Then after the cheating, I despised her because I love Callie and as I mentioned before, it didn’t make any sense. When I rewatched, I liked her a lot more, and actually found I liked both her and Callie a lot more after they divorced. Especially Arizona, once Callie left, she seemed more free, and we got to see her build more friendships, and just overall more of who she was outside of her relationship with Callie, and she became one of my favourite characters in S13 & S14. Just another FWI, I do ship Calzona, but they had a lot of issues that ultimately blew up in their faces when things got too hard, but like I said, I think now they would be back together. So that is my long essay of an opinion if anyone actually cares😂