This is how I would handle the current situation at hand:
Ignoring it all together is not the solution. It’s just going to hamper any further communication and trust me , with a 3 and a 6 year old, you want to make going forward as easy for yourself as possible.
So this is my suggestion .
Reach out to your ex W. Kindly ask that all requests for kids on your custody time be done directly between the two of you. It really is appropriate. The SIL of OM is not a friend or acquaintance of yours to be asking for that.
