When his mother passes away and there is no longer a need for the house, this is what I hope happens. Don't know that it will though. So far, the only legal document for the house states that my husband is 1/2 owner and his brother is 1/2 owner. I've talked to my husband about having his mother draw up a will that says the brother's portion of the house will have the unpaid mortgage payments deducted from it, but his mother has said she would never do that because she thinks it should be 50/50.