Yes..I went through this. W went on a big 'social' streak. Travelled to see friends all over, went out as much as possible, reconnected with everyone she had ever met in her life.
For me, it progressed to a worse state. She became very private, didnt want me to know what she was doing, etc. It was really like dealing with a teenager, but who had money to do whatever they wanted.
My advice would be this. My mistake was persuing like no other. I couldnt stand how I could have been with this person almost 18 yrs and now I'm a stranger. I think the best thing you can do is put all your focus on yourself and your kids. Youre going to hear that all over this board and it is tough to not persue, snoop etc. Please, put total focus on yourself and your kids. I would just totally leave her alone. She is looking at you as getting in her way. No matter what you do, she will turn it to justify her thoughts. So, just leave her alone. Act like you dont give a damn.