Staying With The Comic, Sans (Undertale)

After confessing to your coworker that you had nowhere to go for Christmas, he invites you to stay with him and his brother for the holiday. Their house is located underground, a place you hadn't gone at all even after monsters were reintroduced to humans, so you accepted out of curiosity. You're unsure of how staying with punny Sans and his spaghetti wielding brother Papyrus will go, but at least you won't be bonely.
Sans X Reader
May branch off into just more than a Christmas fic!
I DO NOT OWN THE RIGHTS TO UNDERTALE! THAT'S ON TOBY FOX, NOT ME.