Introducing new partner

I (39 F) got divorced in Sept 2024 from my ex husband (41 M).

Recently, he got into a new relationship. He told me that he doesn’t have plans to introduce the kids to his new girlfriend yet.

However, this past weekend, my daughter let me know that she had a playdate with his girlfriend’s children (an 11 year old girl and 9 year old boy). My daughter is 7 and my son is 5.

They went to the park, a restaurant and they got ice cream together. It hurts because I never met her before. I don’t know anything about her and she’s around my children.

In addition, my daughter said that her dad and his girlfriend were “holding each other” and “looked like they were in love.” It’s been so long since I could say that about the former couple that we were.

I asked him about the weekend. He said he went to those places but conveniently left the part about his girlfriend out. I don’t want to confront him but damn… it’s a weird and hurtful feeling that I have right now.

Any advice on how to cope or move forward?