One of the most helpful realizations in therapy has been that there aren't any "rules" for me. I don't have to worry about whether I am "acting on the desire to take care of the therapist" or whatever. I let her be the therapist and uphold the boundaries and make it all therapeutic, and I say exactly what I want to say for whatever reason I want to say it. It's really freeing.

In these situations, I probably would ask if she was okay, and she would usually thank me for my concern and say something that reassures me that she has plenty of support in her life. I think it's also fine like other people suggested to just say that you've been thinking of her and hoping she's doing okay.

Maybe this isn't really therapy fodder since you may be terminating with her anyway, but I do think your desire to be a "good" client and to monitor/modify your behavior so that she can have the right response might be worth looking into. I don't say this in a judgmental way at all. It's just that for me personally, putting pressure on myself to "perform" correctly, even in therapy, was but one slippery tentacle of the huge thing inside that kept me depressed.