Either of you can file for divorce, but it won't be finalized until after the child is born.
I hate to ask such an indelicate question, but are you the father of the baby?
Property division would be fairly simple - AZ is a community property state, which means anything acquired during the marriage will be split 50/50 and anything you owned prior to the marriage remains yours. Is your wife willing to negotiate the living room set? Do you want it?
If you agree to let her keep the car, make sure your name is taken off the title AND the financial obligation. She may need to refinance it herself.
Have at least an initial consultation with an attorney - it will be worth it.

