Mortgage???

So I need to go to the bank before the big meeting where I Do The Deed on Monday.  For some goddamn reason, though, Mother told me there's a mortgage beginning in the new year.  What mortgage?  Is Mother expecting me to ... pay monthly installments?  Does she think ... I have the money?  I-I-I-I-I thought the house was already paid for.

Ngl, I'm freaking out right now.  Suicidal thoughts have entered my mind.  I can't believe my parents would let me be caught in the lurch if I can't financially cover the house ... right?  Right??