oh my. . .

I get it BDA.

No, I would not use family $ to buy her new titties right now. I'd tell her that its something you're willing to consider in the future, perhaps after she stops treating you like ****** for a while and demonstrates that she's committed to the marriage. Proceeding with that under the threat of no SF is just being a doormat, definetely. If your relationship is the the point where she thinks she can control you with SF, then YOU need to back off and not act very interested in SF.