<human>: So about 10 years ago, my family (my mom and dad) bought an house in the Chicago land area. To pay for the house, they took out a mortgage from two different companies, let's call them A and B. A held about 70% of the mortgage and B held about 30% of the mortgage. 3 years ago, the payments were unbearable and A made an agreement with our family, they will give us X amount of cash and we had over the title of the house. Our family took the deal and has been living somewhere else since. But now B is asking my mom and dad to pay the 30% that they borrowed for the house, but its all down the drain because the house is gone? 

Are they suppose to pay back the that 30%? I wasn't aware of the situation that my parents initially borrowed from two different companies.

If they have to, and they can't, is it pretty much that they have to file for bankruptcy? 

This feels completely unfair to me. My dad is a non-native English speaker and I feel like he just got taken advantage of by these greedy companies, not knowing what he got into.

Can you condense the text into three sentences or less?
<bot>: mortgage A = 70% of house, mortgage B = 30% of house. Made deal with A to give house for cash for us to move out, erase debt, B wants money. What does my family do?