As I was growing up, my mother was like that and my dad was the other extreme in the sense that he hated religon and use to scream things at my mother like "now what does your friend Jesus think about that?" when they were fighting.
I read here (somewhere) the other day that when someone comes from an alcoholic family they do 1 of 3 things.
1. Become an alcoholic
2. Get into a relationship with an alcoholic
3. Become obsessed with religon
And it sounds like your mum is punting on option number 3 now option 2 has gone.
Is it her house? Or your house? Who legally owns it?
If it is her's then I'd suggest you let her do with it what she wishes, regardless of 'whom' or what she wants to credit the work too, and if it really bothers you then stop doing the work so "Saint Joseph" or whoever she wants to credit can pitch in. wink. wink.
If it belongs to both of you, I hope you get a good price! Does it matter who the credit goes too??
As ACOA's, by default, we take care of our parents and we begin to recover when we learn to take care of ourselves and allow others to do what they need to do for themselves no matter how crazy it seems.