Think of when you don’t want something to end.
Like a massage.
Then think of what the masseuse does to clearly and respectfully cue to you and hold the boundary.
They don’t say…” ok…5more mins” and then “ok…another 5 more mins” if you look uncomfortable about it ending.
(and get increasingly distracted and resentful the way we do with our kids when we do that)
They help you transition by doing that slappy slappy thing with their fingers and holding their boundary kindly, calmly and clearly.
There are examples all around in our days about rituals that are set up to help us as adults transition.
If we stay tuned in we can think of some to help our kids through theirs.