Hey Charlie3236:Darn, I had drafted a reply to you earlier, but a power failure occurred in my neighborhood before I could post it (my old computer needs a new battery). I'll try and recreate it.
I'm so sorry about your sister's behavior, during her recent visit. That had to be very unpleasant for both you and your son. How did you handle the situation - did you ask her to leave?
I think we all want to think that bad behavior can be "fixed", never to repeat again. I'm thinking in most cases, the best we can hope for is to minimize the number of episodes and degree of dysregulation. I think it isn't a matter of "If" an unpleasant episode will occur at some point in the future, it's a matter of "when".
All seemed to be good up until today, when she wanted to come and spend time with my son and turned into the nasty, manipulative, totally disrespectful person I thought was maybe gone.
I'm trying to remember she's sick and disordered, so it just doesn't make sense no matter which way you spin it... .And trying not to take it personally. It's so hard.
Is your sister trying any meds? With some people, it can help with leveling out their moods. Are you still in counseling with your sister? Is it possible to have another therapy session together, where you can discuss the visit? If your sister can't participate in a meaningful discussion, the only thing you can do is to set boundaries about any future visits and have a plan in place to terminate a visit abruptly. Maybe, future visits need to occur in a public place, if that could possibly help ward off bad behavior.
It has to be hard to not take the things your sister says personally. We all want a sister with whom we can mutually validate and support each other. It is so much easier to undertand how a stranger can be nasty to us, but not how a relative can treat strangers better than relatives. The logic is that people with BPD save up their bad emotions and tend to dump them where they feel most comfortable and safe.
I think when we can't have the normal sibling we want, it can be a bit of a grieving process. It can sometime be more difficult to not know what behavior you will encounter, especially when you have had some good experiences with your sister.