Unless the 2nd lender agreed that the short sale wiped out or discharged *their* debt, you are still liable for it, even if the 1st lender discharged or wrote off the amount. *Each* lender has to voluntarily agree to give up its debt or claim to money owed. So if the 2nd lender did not forgive, etc. your debt to it, they can still pursue, and even sue, you for the money.