Try this
- Choose the portion both people want to do and make optional extra time explicit.
- Agree on how to end or continue separately. Do not treat the longer participant’s preference as the default standard of a complete session.
A worked example
“We can do one puzzle section together, then continue separately if we want.”
An invented example to adapt, not a real exchange or a script you have to follow.
Before you leave it here
Ending at different times does not mean one person participated incorrectly.