moms who aren’t with the dad

How do you deal with other women being around your kids when you and dad broke up? me and my kids dad broke up after 4 years we have a 3yr old and 1 year old. his new gf wants to meet my kids so bad for whatever reason and he just will not let her only because he doesn’t want anyone else to be around his kids in general and I do the same (unless I get into something really serious and committed) i’m not sure why she wants to be around my kids but she gets upset when he tells her no. how did y’all deal with that? i’m feeling a little weird that she’s forcing it.. it’s his business but I don’t want flings around my kids.