2 weeks after we broke up I reconnected w an old flame and we are getting pretty serious. We're going on vacation w each other and everything. He wants me to meet his family and such. But he has 2 kids and I'm super nervous. His kids are his world, he has full custody so they live w him. I talk to him and he told me not to worry they'll love me blah blah blah. But more than anything I don't want his baby momma to think that I'm trying to replace her in their life. So what do I do?