What a confusing and frustrating situation, Rocco6. I'm sorry that she did al, of the push-pull towards you. Sadly, that is often typically BPD.
I was going to say initially that this sounded like the behavior of end extremeny immature young woman until I got to the part where she is a grandmother, so I'd posit that the youngest she could be in in her mid to late 40s. No matter her age, I'll still say that. pwBPD (people with BPD) suffer not only from severe abandonment fears and a fear of intimacy (which can be confusing if they "love bomb" us), but also from arrested development. When they paint us black, it's like a fight or flight response, instinctual. It's also often a dissociative event, so her aplogies were probably sincere,
at the time. Maybe you could read this discussion on splitting to get a better idea:
BPD BEHAVIORS: SplittingI understand how confusing this must have been she threatened to call 911. You spend the night with her a week later, then after that, you are intimate. All the while she's dysregulating and splitting you back and forth.
At this point I'd ask you what you want to do, but being served with a protection order is very serious business. Members here have ended up in jail due to these, even if their pwBPD violates the order and reaches out to them. If you have questions about your liability in this situation,.post a short version to the Legal Board.
I know it's tough, and her cheating in the beginning must have been especially awful, Rocco. Many of us have been there and still wanted to try and make it work. Maybe you feel powerless when your pwBPD makes his or her choice for you. I know I did, and a year later, I'm still trying to come to terms with it. Stick around, you're in good company.

Turkish