My SO had 2 kids! one of them is 8 other is 6 we have a 3 month baby girl together .. the youngest (6years) likes to call me mommy I don't like when she calls me that idk why but it really bothers me her mother and I don't get along at all idk if this bcs of that. my SO hates when I tell her not to call me that he told me if she feels comfortable and sees you as her mom just let her but I can't ... am I being immature?