Nice animation and pretty fun too, but it's the audio that brings it down. I know you can't just make your mic higher quality, but I feel like you should have left out or significantly lowered the volume on the music. It didn't really fit (too dramatic) and made the lines slightly harder to understand. I liked the premise and the Christmas season joke was nicely executed with those few moments of silence before the switch back to talking. That's the one point where I feel the music came in nicely. The ending didn't have much of a punchline, though, maybe if Mary had gone into labor or something?
Overall it could have had a bit more humor to it, sone extra jokes and a better punchline, as well as some better sound design, but I do appreciate the good parts. Merry Christmas!