I don't understand what the big deal about locking the bedroom door is. We do it all the time. We don't want the 23m old busting in at just "any"time. He can operate the knob, but if it is locked, he knows to knock. None of my kids sleep with us, nor have they ever. They are used to, and like, their own beds. If my 3 year old got up for some silliness like the OP's in the middle of the night, we would simply tell her "go back to bed."
Because it clearly isn't normally locked, and was used as a threat to keep the kid from bothering them.
If the house standard operating procedure is a locked bedroom door that the kid knocks on and parents are aware a little kid may be softly knocking, then no big deal. If the house standard is unlocked doors, and the threat is 'we'll lock everyone's bedroom doors if you keep coming in bedrooms at night' it'd likely read to a 5-year-old as he'll be alone and without help or recourse.
If his standard isn't to knock on inside doors, if they're not locked in general, then it's not just no big deal like it is in a house like yours, in which it's how it works. It's a scary shunning type threat. It wasn't 'we'll lock the doors and then you'll have to knock,' because he doesn't want him to knock.
time. He can operate the knob, but if it is locked, he knows to knock. None of my kids sleep with us, nor have they ever. They are used to, and like, their own beds. If my 3 year old got up for some silliness like the OP's in the middle of the night, we would simply tell her "go back to bed."



