Papyrus:
"Come on sis. Say my name. Say 'boss'!" Papyrus said calmly.
"Ba....bu..."
'Is she really going to-"
"BITCH!" You said with a pure innocent look.
"..."
"SANS... YOU LAUGH AND I WILL USE YOUR SKULL AS A SERVING BOWL."
Sans:
"Come on sis! Say my name! Say 'Sans'!"
"Su...sa...si..."
Sans sighed and started to look away till...
"SHIT!"
Sans passed out as Papyrus spun you around. "YES LITTLE SISTER! THAT IS HIS NAME! WHO'S MY LITTLE SISTER WHO I AM PROUD OF?" You made some baby giggles and cooes as Papyrus hugged you.
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Underfell Sister Scenarios
FanficHow would your life be as Sans and Papyrus's sister in Underfell?