Disclaimer: FMA belongs to Arakawa Hiromu
Notes: Part 15 of my Future storyline arc. There are so many sleep-related themes, so I had to do one in the arc, of course! And, bluphoenix5, I tried to search for your username to send you back a message but it wasn't there for some reason. I'm sure I've found you at some point before. Anyway, on the point you brought up about "O Child-sama", he was the only child from two of them at the time, in that first little handful of kids from the other guys. Sure, he has a sister now, but that's after that first paragraph.
Fifty-eight: Before Falling Asleep
As compared to other homes, the Mustang household could be considered a rather quiet place. There was the odd crying child from time to time, but their parties didn't get out of hand, their arguments were few, and the children were generally well-behaved, as befitted the Fuhrer's family. Bedtime, while hardly a matter for tantrums, didn't quite fit in with that peaceful image.
Suri, as playful as she could be, was still only three, and wasn't awake enough to cause much of a fuss. Instead, she followed her brother's lead, because, as a five-year-old, he was much older, and much more capable of nonsense than she was.
"No, I don't want to go to sleep," he'd say. "Can't I have a drink of milk first?" Suri, huddled beside him, always had a fistful of his shirt in one hand.
Mum or Dad (or perhaps both, if neither was busy) would look very serious. "That makes you wet the bed, remember? You've gone a whole week, now-"
"But I'm thirsty."
Or, if that didn't work, "But you're not going to bed."
"We're older than you are, Sasha. We don't need as much sleep."
He'd pout. Another tactic was one of his and Suri's favourites – and, coincidentally, his parents' favourite as well. "Can you tell us a story first?" What Sasha and Suri didn't realise was that their parents were quite capable of manoeuvring them into bed, and this just happened to be the easiest way.
"Alright," they'd be told. "But you both need to brush your teeth and wash your faces first. Then get into your pyjamas, and we can have a story in bed."
This meant that ten minutes later they'd all clamber onto Sasha's big bed – big for him, in any case – and Sasha would climb underneath the sheets. Suri sat on her mother's lap, or her father's, and the children drifted off, listening to the sound of their parents' voices. When both were asleep, the light would be turned off and Suri would be carried into her own room and put in her own bed.
"Stories about Xing?" (Or whatever had been the story's topic that night) "They want to start travelling already, don't they?"
And so a night would pass.