Ex husband and I broke up in August 2021, we have two kids age 12 and 8. I met someone and introduced them to my kids and met there's in summer 2022 after we had been dating for six months. It didn't work out and we split in December. I have met someone else who seems great, we went on a couple of dates and arranged to meet up with our kids at the end of the Christmas holidays in a local country park. I introduced him to my boys as a friend and we weren't touchy feely or anything with each other. My ex found out through the kids and was not happy. He is annoyed the kids have met two bf in six months and feels I haven't known my bf long enough to introduce him. As I said the kids only know he was a friend, we had a lovely day out and my kids are happy and well looked after. AIBU to think that after 18 months apart it really isn't any of my ex's business and he need to keep out of it? My kids were fine when my last relationship ended.