Married Sims Suddenly Turn into Siblings

My two lesbian sims keep turning into siblings. I’ve cleared my mods folder, I tried to delete both of their relationships with MCC but it won’t delete either and it worked before but now it’s not. I’m sick and tired of this, I’ve had this bug for maybe 2 years or so. I don’t know what to do. Everything I try to do doesn’t work. It’s only with this household. I really want this to get fixed. I’ve read this is the Alabama bug I think.