That night, while Blaine was washing dishes, he heard what sounded like arguing upstairs. He set down the plate he was scrubbing and slowly went down the hallway to Kurt's room.
"-I know I won't!" Kurt was whining.
"You need it, baby." Sebastian cooed.
"No I don't! Just one night to prove it, please?" Kurt begged, his eyes big and watery.
Sebastian stared at those eyes and sighed. "Ask Papa."
Kurt turned to Blaine with the same expression.
"What is it, sweetheart?" Blaine asked.
"I don't need a diaper when I go to bed!" Kurt whined.
Blaine frowned. "Are you sure baby? You always wake up wet."
Kurt's lip wobbled. "That's 'cause I'm wearing the diaper. Just one chance, please?"
Blaine looked up at Sebastian. "One night couldn't hurt."
Sebastian sighed. "It'll hurt the mattress, that's for sure."
"Pleeeaaaasse, Daddy!" Kurt pleaded.
Sebastian sighed and ran a hand over his hair. "All right, but if he has an accident, you're cleaning it up." He told Blaine.
Knowing that Sebastian would totally help him clean up anyways, Blaine nodded.
Kurt beamed and squealed happily. "Thank you, Daddy! Thank you Papa!"
"Yea, alright. Now lie down." Sebastian said.
After a kiss goodnight from each man, Kurt snuggled his bear, closing his eyes as Sebastian flipped off the lights and followed Blaine to the kitchen.