I don’t think my mum knows what she’s agreed to though, but she can’t go back on her word now!
I hope the grinning smiley you put on the end of that sentence meant you weren't completely serious about that! Securing my parents' house against anything - particularly a loan, the repayments of which depend on me getting a job in such a volatile industry - is something I could never do. Think very, very carefully if this is the way you intend to proceed. And you should certainly make sure your mum knows EXACTLY what she's agreed to.