We will lose our home of 24+ years next year.

Hello we are in Texas. My mother is planning on using rocket mortgage next march and doesn’t plan on paying it back. My father wants to stop her, they both own the home. I’m for-sure she won’t pay it back, she’s never paid anything back EVER she is in 60,000+ dollars in debt. So I read on their website they only need 1 of the homeowners to go through with rocket mortgage. Is it possible to get a lawyer to stop this? My mother is 64 my dad is 65 he and I don’t want her to do this because we know she won’t pay it back. This should be illegal or something like getting a lone and knowingly not paying it back. I refuse to let this happen. Sorry if I worded things wrong or anything I’m so scared and nervous and don’t really understand all this stuff. I just 100% know for sure my mother will leave me and my father high and dry.