That site is a riot! LOL!
I wouldn't be surprised if the letter was real. Most of my father's side of the family is estranged from a certain nephew and his wife. (LONG story!) The wife morphed into some type of demon after she had her first kid. Anyway, apparently, she assigned people foods to bring for Thanksgiving because she and my cousin couldn't afford to host Thanksgiving dinner. The kicker? The people they invited were my uncle (cousin's father) and aunt (cousin's stepmom) who came in from 3,000 miles away and were staying at my grandmother's house; they invited my 83 year old grandmother, who had bypass surgery 10 months before, and my 98 year old aunt, who was going blind and had bad arthritis. (Yes, they ALL were assigned dishes to bring, like mashed potatoes, pies, casseroles, etc., etc.) THEN they asked my cousin's mother to come over two days before Thanksgiving with the turkey!

Fortunately, this was far enough in advance where my uncle, aunt, and cousin's mother all decided to take everyone out to dinner at a restaurant for Thanksgiving.