I get where you're coming from. It's a silly little thing, sure, but sometimes one needs to know for peace of mind.
I forget what your kids ages are, but my presumption was that you would be an adult in one room and your SO the adult in the other? If so, then in the worst case scenario there will be an adult with the kids.
Best thing to do, IMO, is to call up Royal Caribbean and see if you are in the same muster station. I do not recommend asking on CC. A cursory search shows that this is one of those questions that posters get beat up over.
And I don't know if this will help any, but I found
this post in the RCBlog forums that shows the Assembly station breakdown. Muster stations are further subdivided, of course, but at least you get an idea of how the ship is split up.