Horsing Around (sans x baby!centaur!reader)

It was a normal day in Undertale, or so it seemed.
Sans was sleeping at his sentry post in hotland until he heard crying of a baby nearby. Curious, he went to investigate, but what he found wasn't a child.
Well, not quite.
It was a newborn female centaur foal, a human-horse hybrid, hiding in Hotland, far away from any other centaurs or monsters, only with a stick to defend herself with, a small ocarina, and the clothes on her back.
Naturally, Sans takes her home before anything bad happens and with the help of his friends and his brother Papyrus, they take care of the little foal.