Lotion or candles, or if you want something a bit nicer, a gift basket from a lotion or candle store. Lotion can be iffy if she's allergic to scents (I always get all my mom's lotion.
Or a pretty scarf that's mainstream--from a common store, so that she can return it on the sly if she doesn't like it. (Same with the lotions and candles.) And gift receipts are always good for people you don't know that well. I wouldn't knit a scarf because if she doesn't like it, she's stuck with it, and you spent all that time on something she doesn't like.