My ex is suddenly being nice?

A little background. A little over 2 years ago I (48M) started the process of getting divorced from my ex (43F). We were together for about 18 years. She had cheated multiple times and was very emotionally abusive to me and the kids throughout. We’ve got 3 kids, (16F, 19F and 23F) but only one is under the 50/50 custody arrangement since the others are adults and have moved out.

Back in December my youngest was struggling with going back and forth between the houses and she wanted to stay with her mom full time. Her mom is the “fun” parent, with little to no rules or structure or supervision. I told her I didn’t think it was a good idea and I didn’t want to only see her once in a while so I agreed to go a little bit easier on her with some of our rules but I still had to be a parent and she still had chores and such.

My ex and I had a high conflict divorce. When I filed she essentially went no contact. She refused to move out, but also wasn’t involved with the kids, pets, paying any bills, etc. She tried to take the kids, tried to get me kicked out of the house, tried to get alimony, and was caught on video saying she wanted to take me for everything I had and make me suffer.

I fought successfully and got a fair settlement. We split everything 50/50 and she finally moved out. We created a schedule based on the decree and it was good.

We use AppClose to discuss things when needed. We have switched off schedules a few times but mostly the conversation is tense and limited to the absolute minimum needed to get things done.

There have been times when our daughter has had issues with getting behind on homework or issues with her boyfriend and I’ve asked for a united front to handle it and gotten rebuked or flat out ignored.

A few weeks ago our daughter got suspended from school. I got the call from the school and then immediately told my ex about it. We had a good exchange through the app and even a phone call that went well.

Ever since then she’s been unusually nice. I would go so far as to say she has been friendly. I’m still limiting contact to only things that regard our daughter, but she has been initiating contact at times and has even given out information that she previously wouldn’t have given. An example is that she is moving into a new place and she has given me details about the process without my asking. It’s good information to know, but in the past she was very hush hush about everything, convinced that I would somehow use the information against her.

I highly suspect that something is up and not that she’s turned a new leaf and finally started to move on. Not sure what that could be, although I suspect it’s financially motivated.

I have no desire to rekindle anything with her and only wish to have a reasonably nice coparenting relationship with her since we have kids and a granddaughter, so on the surface it would seem that I’m getting what I want, but it definitely is suspicious.

Has anyone else ever had a high conflict ex suddenly become nice and was it real or just a facade?