She is a thief. If the banks are thieves I hope they suffer for it, but she signed a contract to pay back a loan with money that was on deposit at a bank from widows, orphans, retired people and anyone else that has a bank account. It is NOT the banks money. It is owned by the banks depositors.
You think it is fine that she steels a home because some bank sold its’ loan to a mortgage servicing company?
You are championing theft.
Who should she pay? Someone who doesn’t own the loan?
The banks made this bed and they can sleep in it.