Hard to call. Don't worry about analyzing every breath. She probably does need money to pay the mortgage. That seems completely reasonable.
Remember, standing up to her does not mean being punitive or dicky, just strong and confident. Don't play games just to screw with her. Do NOT let her walk over you but do not antagonize her. Even if you kick her to the curb (two snaps up), you are doing it because you will not tolerate a cheating wife not because you are trying to mess with her.
Why don't you pay the mortgage yourself. Wouldn't that be a 180?
Me 44 She 46 S13 D9 M18 T23 3 years DB'ing Successfully busted