I can only second everyone else's comments. Rob is especially spot on.
Mark, in the past, has your W been in the habit of getting presents for your parents? Is this the repetition of past behaviors? Or something new?
Either way it represents a bit of guilt on her part, mixed with a desire (conscious or subconscious) to maintain a link with you and your family.
(My W, on the other hand, has totally ignored my family, even when she would have been sending gifts to them of her own accord in the past -- that's how much she has alienated them as well as myself.)
