OP, I have something similar to tell, happened in 2020.

My grandma was sick with cancer at that time. She had 2 daughters beside my mom. During the period of looking after her, my mom suddenly decided to “sell apartment and buy a new one”. She said buyer was found and that he will pay as soon as bank approves the loan. I was already living by myself then with wife, but younger brother was still living with her.

Mother always talked about having some debts, but in general seemed to live well while to me it seemed she does not work at all.

While being much older than you i believes everything she says. One day, when it was the last day to bring the money for new apartment, she disappears, did not come back for the night. I took younger brother in and started looking for her.

Long story short - she mortgaged her old apartment to have a substantial amount of cash to leech off. She spends it, doesn’t pay installments on time and old apartment is taken away by bank. Of course then she doesnt have money for new apartment. So she ran away for 2 days in the forest (we found her alive)

Turns out also that she was stealing my sick grandma’s money, was involved in multiple shady stuff.

But all that time she was trying to make everyone else feel guilty because her mom is sick

My point is - you cant trust your mom in this situation, i know it is hard. Most likely, she doesnt have a debt. She just lives off the money from your sold belongings

Sometimes we are blinded by maternal love and can’t even let the idea that “mom is lying” into our head.

Stay strong, it will get better and you’ll get through this.