I don't know your wife nor her work company, but I do know that when you work for who I used to work for if you were out on medical leave...they DO follow you. They follow you to find out if you are really hurt, or really sick. They take photos and they have a team that does this for a full time job.
And..people do get hacked and spied on through the computer. Now I don't know that your job would do it, but I have had it happen, and I have seen it happen to others. It is serious stuff and it does make you crazy feeling.
Just a thought. The worst thing is while this happens, most people don;t believe you and they turn away from you. In fact it is so odd I would have found it crazy myself until I had been there on both counts. I tend to really keep an open mind about what people are going through now.
Divorce is hard and cutting the ties can kill a person. It is emotionally draining and one cannot expect anyone else to make it through the same.
I feel for the both of you. It is a hard spot to be in.