i.e. your 99 pay the same amount of $ for the family.
If your 62 99 share half of the mortgage with your C6, will you feel better?
For example, your 62 99 give $4250 to you monthly. However, you should also share living expenses with your 62 99. You give 4k (or 4.5k) to your 99 as your living expenses!
Onec more, as a son, your husband should give pocket $ to 62 99, say 3k-4k monthly.