Can all of you have a pleasant Christmas Eve at your in-laws' house without too much awkwardness? Alternatively, you could go disguised as Santa Claus (kind of like Mrs. Doubtfire) and get your xW to sit in Santa's lap and reach in his pocket for a Christmas surprise. The fun you could have...
I like your style doodler. I'm thinking the Claus outfit is the way to go. She just put her profile up on Match, so maybe she needs that Christmas surprise...