Badblood

So my new gf and I are in bed sleeping, and the STBEW calls. She goes on and on about how much she loves me and needs me and that if I will take her back, she will lick my boots, and she won't object if I **** other women, but will be my slave, etc, etc.. She starts crying and says that the next time she tries to kill herself she will succeed. I am scared to death, and get dressed and keep her on the phone while my GF calls her sister to find out what the **** is happening. Her sister took her to the hospital again and it turns out that she has been having hormonal problems and it has screwed up her depression medication. THIS SUCKS!!! Is this how it's going to be from now on? I feel like I'm being held hostage because of her emotional problems. I am really trying to be supportive, but where does that end? I don't want to be the cause of her continued problems, so I guess I'm on the hook for her to get her head straight. The only good thing is my GF has been a ROCk through this and is willing to help in any way she can. She told me right after, that she's in love with me and will always be there for me.