The Ex was a nympho, still is. We went to a Christmas party for adults one time and after Santa gave out all the gag gifts and toys, he went to drinking with the rest of us. As the party started winding down, there were about 3 couples and a few singles, the Ex went up to Santa and asked what was in his bag. He said I'll have to show you in private, and they continued joking around. After about 10 minutes I noticed Ex and Santa were both gone, so I started looking for them, gave up after 20 minutes and went to our room to take a leak. When I opened door there they were, Santa laying on his back in bed with his pants around his ankles, the Ex in a 69 with him her skirt pulled up him going to town, her slobbering over his cock. Watched for a few, then took a leak. When I came out both were out of their clothes, so I joined them and we both stuffed her stockings that night