Wow. that's really alot to absorb for a little child! Why would the in-laws be like that!? Well, to give you an idea of what happens in my family...On my husband's side, his dad remarried (over 25 years ago), so the wife is considered Grandmom, and he is PopPop. BUT! my Dad, decided he wanted to be called PopPop. Sigh! My daughter is only 17 months and doesn't see either one of them because we're 300 miles away. There's no easy solution, for me. I just try to differentiate by using our last name after Grandmom, or PopPop. When she starts speaking, I'm hoping whatever she wants to call them they will embrace. I'm sorry you have to go through that with your in-laws. A thought though--Maybe you shouldn't make a big deal of it. and just let it go. Maybe since you are feeling like you need to resolve this, its feeding more to the fire. Let your daughter make up her own mind, and say "oh isn't that wonderful!? She loves to address you as her "Pop and Nana"!" I'm interested to hear what others say. Lots of luck.