Just as a thought experiment ... what would happen if you went cold turkey and didn't provide for the emotional/material needs of your W?
I kind of did stop providing emotional support and within a few days we had the first decent sex in 10 months. But, then she kinda cooled out on me and might even be ok with it (today anyway) I don't think it's been long enough to say for sure.
I'm not sure what would happen if I stopped providing material support. That would actually be pretty cruel as she has little money of her own. I would think she would be pretty mad at me and probably scared for her future.