She's been up for far too long. Charmy goes downstairs to Tails' workshop to make sure she's still awake and to also make sure she actually gets to bed after being up for so long. Charmy walks down the stairs to find a still awake Tails who is working on something.
"Tails you should probably go to sleep"
"I'll only be a bit longer."
"I know that's not true, Tails"
"Give me a second."
Charmy grabs Tails, preventing her from moving anywhere. Tails struggle but can't much, she's way too tired.
"I'm taking you to bed"
"F-*yawn* Fine"
Charmy takes Tails by her back and helps her get off her bench and up the stairs, then walking around then up more stairs then finally to bed. Charmy tucks Tails into bed.
"And to make sure you don't get up" Charmy goes into bed with Tails and wraps their arms around her.
"Fine." Tails says grumpily
"Good night, Love you" Charmy happily says to their girlfriend.
"…Love you too." Tails says still mad at Charmy for forcing her to go to bed.
Tails immediately falls asleep. Too tired to be mad at Charmy. The bee falls asleep only a bit after that, happy to get their girlfriend to bed.