Oh, right, you didn’t hear. I’m making them bad people. They really did sell her because her father had PTSD over the Force after suffering a bunch of experiments on Exegol. So when she started demonstrating Force powers, he was terrified, and convinced his wife to sell her. They were also drunks.
The reason I’m giving for why they don’t give up her location is that Ochi tells her father that he will never be able to leave Exegol again. So rather than return to his personal hell, he’d rather just die as well as spite Palpatine.
I may dedicate a whole portion of a chapter to their backstory. Who knows.