Check the going rate for house cleaning in your area & work backward from there. Pay her by check so her worthless boyfriend doesn't get the money, or deposit the money into her acct & give her the slip. Don't try to deal with her--thank her for letting you live there till your wedding, hug her, tell her you love her. Don't defend yourself. Don't try to explain yourself. Expect less of her at this point.

I hope the marriage works & you grow into a healthy & cuddly love.