Grieving "Peanuts" and Estate Planning

It's great to see big companies putting estate planning information on the internet.  However, Christopher Bahn from The Onion's AV Club Blog makes a pretty funny observation:

[H]ere's my all-time favorite official Peanuts tie-in: Charlie Brown and his friends are the corporate mascots of Metropolitan Life Insurance, and their images are festooned all over the company's website—which leads to this unintentionally bizarre and disquieting juxtaposition. Who do you suppose he's grieving for? Based on the available evidence, possibly Sally.