Last night N slept through the night in his room.
Today morning, at around 7 he tiptoed into our room and then climbed up into our bed.
I asked him a very rhetorical question "Did my pumpkin sleep in his room last night?"
"Yesssssss" said N.
"Was it fun?"
"Yessssss. Nini Minnie" ('Nini' means sleep in N's language).
"Who's Minnie?" said S.
N went into his room and brought back a pink-dress-wearing Minnie mouse toy with him (Minnie mouse as in Mickey mouse's companion).
S and I looked at each other and exchanged a glance which felt like "If that's what it takes to get you to sleep through the night in your room, we don't mind you sleeping with Minnie."