"Sasuke...Sasuke..." Mumbling incoherently, the boy rolls over on his side. His brother shakes his shoulder, and he finally wakes up. "What?" Itachi looks at his feet. "I... it happened again." Sasuke sits up and smiles at his older brother. "Do you want me to help you change the sheets?" Itachi shakes his head, obviously embarrassed by the question. "Can you just get Mom?" "Yeah."
"Mmmm..." Mikoto blinks awake and stares at her youngest son. "Do you want a glass of water...?" "No. Itachi wet his bed." She sighs and rolls out of bed, tiredly stumbling down the hall. The Uchiha prodigy is nowhere to be seen, but the shower is running in the other room. Mikoto strips the wet sheets and carries them to the laundry room, throwing them in a basket to wash tomorrow. She quietly opens the door to the bathroom and picks up the saturated pajamas from the floor. "Itachi?" "Y-yes?" "When you get out of there, I want to talk to you, okay?" "I didn't mean to-" "It's fine. Just hurry up, please."
A few minutes later, Sasuke has been sent out to the hall, while Mikoto sits on the edge of the now sheetless and stained mattress. Itachi is leaning against the wall, his knees pulled up to his chest. His mother strokes his head, smiling as gently as she can at 2 AM after waking up to find that her teenage son has wet the bed for the eighth night in a row. "Sweetie, I think I'll put a plastic sheet on your bed, okay? I don't want you to ruin the mattress..." Itachi swallows. "Yeah, that's fine." A pause, and then: "You won't tell Father, will you?" "Of course not. He... wouldn't understand, I don't think."
When he's finally allowed to go back to bed, Sasuke immediately starts to fall asleep... but he's drawn back to reality by soft sobbing. "Nii-san?" Itachi quickly stifles the little noise he'd been making, but Sasuke runs over to his bed anyway. "Are you sad because you're cold?" There aren't sheets on his bed anymore, so maybe that's it? Sasuke smiles innocently and takes his big brother's hand. "You can sleep with me for the rest of the night." Ignoring Itachi's quiet protests-"what if I pee in your bed?"-he pulls him to the other side of the room and pushes him onto his own bed, snuggling up next to him and tugging the sheets over both of them.