Why am i so nice?

So i live in deplexs, i have this neighbor lady who is very sweet and nice but shes crazy. Shes the type of person who thinks her way is the right way, kind of like a monster in law if you get my drift. Shes making me a baby blanket and is excited for my son to be born. I just recently had a conversation and my babyshower came up in the convo. She asked if she was invited, i said yes. Most of the time i hear her bitching about this and that and what all needs to get done in our little duplexs....i half ass listen because im too nice to tell her to shut up. Well now she is invited to my babyshower, why, why cant i say no!!