I see a therapist for my own issues, many of which stem from the abuse that my sister put me through as a child. I am just trying to get through the smiling and nodding bit for now - I am not going to hide that I've talked to Beatrice, as Grace knows that Beatrice is not a fan of New Man. For right now, I know it wouldn't help if I said "Well, Beatrice didn't think he was so wonderful", but I don't know how to be gracious about effusive praise from my sister, when Beatrice is telling me the exact opposite.
We know we can't control a single thing she does, but we do need to keep informed. I didn't know that Grace had dropped all psych care, nor did my father, but we know now. She has recently been running up huge bills - I have not yet asked Beatrice what that's about, because Grace simply asked our father for what was left of her college fund, but our father is extremely worried about her, especially now that he knows she is not seeing any therapist or taking any medication. I know I can't ask Grace, because I won't get a straight or an honest answer. Grace knows that Beatrice and I are friends in our own right, so she knows we talk sometimes.
Beatrice also recently thanked me for giving her a place to vent about Grace, because dealing with Grace can be so draining. You don't want to get too angry with her when she's being monstrously insensitive, or refusing point blank to deal with facts, or doing dangerous or downright stupid things (especially because she's really an incredibly intelligent person), because you know she can't help it to some extent, but sometimes steam needs to be blown off. I'm Beatrice's best valve, because I understand Grace as well as she does, and I know what living with her is like, though Grace has never beaten Beatrice.