Hi PascaleP1, glad you found us. This is the right place to vent, get support, and lean on others who are on similar journeys.
When a child has BPD or BPD-type traits, "normal range" parenting often isn't successful, as pwBPD don't have "normal range" emotional responses. Whereas a typical 20-something living independently with a job schedule will understand that "no, I don't get to have the same experiences as young teen siblings, and I might feel a little sad, but I get it" (about a parent making a "normal" plan to do something with some but not all the kids), a pwBPD may feel harmfully intense emotions and be "convinced" of being abandoned/betrayed.
I'm sad, scared and angry as hell.
Yes. Makes sense.
This is manipulation even if she can't help it.
Also makes sense that you feel so manipulated/"strings pulled", and whether she meant to or not, in a way doesn't matter.
I have to get her from the hospital in a few hours and I need to start setting boundaries.
Is she still on your insurance?
Can I ask, who sent her to the hospital? Her partner? If so, what's your relationship with her partner like?
I am afraid of triggering something if /when I will say something. Any advise?
There's a phrase that gets brought up here: "Before we can make things better, we have to stop making things worse".
This isn't to assign blame or fault. It's more to recognize that yes, we want more positive/healthy relationships with the pwBPD in our life, and we may be doing things or saying things that inadvertently "fuel the fire". To get to those positive/healthy relationships, we need to identify the things we're saying or doing -- even to help -- that might be sending things in the opposite direction, and try stopping doing those things.
One doorway towards something different to try would be the concepts of validation/not being invalidating.
"Validation" could be seen as the "making things better" side, while "not being invalidating" is more the "let's stop making things worse" side.
Here's a link you can check out, about how to be less invalidating:
https://bpdfamily.com/content/communication-skills-dont-be-invalidatingLet us know what you think and if it's something you feel up for trying -- I hear you when you say you don't want to trigger something and are looking for advice on how to say/do stuff that doesn't escalate.
Hope you guys had some peaceful moments in the last few days.
kells76