you were simply just laying in your bed.. Until you got a text from sans telling you to come to his house.. You go over.. He's looking after his baby brother.. Feeding him milk and telling him he'll be a big strong bone boi..sans then notices you and quickly puts papyrus in your arms and literally just leaves.. He stuck a note in your hands before leaving..

"sorry, Need to visit Dr. Alphys."

you realise sans just tricked you into baby sitting his little brother

"Nyeh!"

oh boy...