They refuse to share
even when a solution
to satisfy both
is so purely clear.

If he hands her the device
before entering After School
then she can get her alotted screen time
at a point when the noise won’t disturb him

but he can’t stand that somebody else
would be touching his stuff
so they fight over their time
with the limited resource
thus losing that time
and everyone is miserable.

I could solve the issue
by buying another device
but how else
will they learn about citizenship?