What does one buy their sister-in-law whom they like but don't know that well?
She's a professional cellist and mum to The Baby's Cousin, who is three months older and looks enough like her to be her brother. (Twin brother.) She has no known hobbies (at least, not known to me, I'm sure she has them) and likes to wear earth tones.
Lacking a better idea, I'm going to putz out and buy her bubble bath and crap. One of you guys has to have a better idea.