My parents were divorced but the hell didn't start until my mom died 6 months later and my dad moved his pregnant mistress into my moms bed. THAT is when i really snapped because that's when the abuse began. I blame my PTSD on that but as far as BP, I think we're born with a predisposition to it from the start. I believe that even if my parents stayed together and were happy, I'd still end up MI.