A Christmas Story :D (Sans x Reader!~)

Hmm,you are spending some time in the underground for christmas,oh how wonderful!yet sans still thinks you are a.."Threat" and that no one can see it,you decide to show him that you aren't a threat and that you are kind and caring.you plan to give him a "sweet" surprise til christmas comes to pass!oh how "fun" it'll be~ ;) but as you dont know sans has a very "Special" surprise for you~ ;)