Every family who celebrates Christmas has their little version of tradition. They've honed their ritual-- what they eat, where they go, and when they open presents. Some folks go to church the night before, some on the day, and some don't go at all. Some eat a traditional roast and some mix it up. Santa might wrap your presents or leave them unwrapped. You might have a stocking or just do a gift exchange. Everyone does it a little differently . But what happens when two families, and thus two t…