She doesn't want out, she just doesn't want to be married. But she wants the security for herself, and especially for the kids of being married.
I think you might have a better chance of motivating her if you approach the underlying feelings- Here's a question: Do you understand why she doesn't want a romantic R? Is she angry about certain things? Perhaps some 180s are in order that address the reasons why she pulls away.
I definitely understand why you feel stuck, and I'm sorry.. more than words can say. However, In terms of piecing(if this is what you want), you are in an advantageous position still being in the house together and knowing she does not want to leave the house.
DBer since 2003 D - 3/24/09 GAL and DBing for myself