How do you handle the death of an ex-family member?

My stbx sent me an email yesterday letting me know her grandmother passed away that morning. I'm not quite sure what the best way is to handle it. When I first met my wife in 2002, her grandmother had a moderate onset of Alzheimer's, which had grown progressively worse. During the last few years, my wife would spend every Sunday and most Saturdays caring for her--cleaning and changing her, preparing her meals, putting her to bed, etc. Most times, I would go with her.

She told me I did not have to do anything, but I still feel something should be done. I did reply to her email to give my condolences and thank her for letting me know. Should I do more, such as flowers or a fruit basket? I will not be going to any of the services; as civil as we may be through emails and lawyers, we're not quite ready to meet face-to-face.

(Parenthetically, the timing of this sucks. I received the final copy of the separation agreement from her attorney the same day.)