It sounds like she has unreasonable expectations of you. If you are not one to buddy-buddy with every metamour, nor be the BFF/Hostess type, then don't be. You can be courteous without being her friend. If she can't handle who you are, that's her issue to deal with, not yours. Don't twist yourself into knots trying to be something you aren't. Just be yourself, and go with what your gut tells you.
Me: 33 F
Married to: Storm 35 M