1) I think you can feel free asking any questions that pertain to your son, such as his childcare (as long as it is truly about your son, and not some thinly covered attempt to snoop on her). Even if you split, you will still be involved in and responsible for his upbringing.
2) I would advise you not to worry about petty stuff like things she took to sell. If you have expensive things like a Rolex watch or valuable things like your grandparents wedding rings, you should put them away (safe deposit box maybe). But a sixty dollar gift card is not worth the trouble, in my opinion. Do you think you will remember about this gift card 5 years from now? Even 5 months from now? I do not think so.
3) I missed your posts over the last few weeks. It looks like she has moved out. Why does she still come and go as if your house is a hotel? If she wants to come, she needs a reason from now on. This is your home now, not hers.I would consider changing the locks. You do not need to confront her about it, you can just do it and tell her you have done it.This is what I think at least.
