Just caught up. Sorry to hear this. We know she isn't attracting good people in the state she's in. It's not possible.
Take some time to process it all and then once you have, you can decide what you will and will not continue to do for her. I used to make these decisions by thinking: what advice would I give my kids in this scenario?
One foot in front of the other. You will get through this and be stronger.
Me 41, H 47, M 15 yrs, S11, S13 BD 1: 11/4/14 we work on it; really I pretzel myself BD 2: 3/31/15 H goes down to "dorm room" 8/15: H back to MBR 10/15: H back in dorm room 1/18: H files, now divorced