Sometimes I discuss our personal plans with my wife, but she always have to include her parents decision, or what her mother thinks of in our decisions. And when I tell her off about it, or remind her about us making our own decisions she just jumps off and wants to forget about everything.
Because women are flexible, not as stubborn as men
About your case, your wife is still Daddy's and Mommy's girl.
She probably got very much pressure from her parents, and now you put pressure on her, so no doubt that she just want to forget everything. You would have to try to understand and be generous with her.