I have been with my partner for 2 years. He was married and has 2 children with his ex wife. They divorced about 10 years ago. He’s had a couple of relationships since and when I met my partner his ex wife was living with someone. When I first met my partner he was on friendly terms with his ex wife and messaged occasionally but not often. Fast forward a year and his ex wife is now single and this has seemed to open up more a friendship with them, she got my partner a birthday present this year (she didn’t last year) and messages him more and seems to ring him more about the kids. If this was how it was when we first met I might not be as bothered but I have sensed a shift and not sure what to think. She has met me a few times for 5 mins and seems nice enough. The kids are 19 & 22 so not babies.