You shouldn't be late around your kids.
Sandra's child and teacher are waiting for her to get to a school meeting.
Sandra wants to get to the meeting.
Sandra is careful to arrive at the meeting on time and fully prepared.
Sandra loses track of time doing unrelated things and arrives to the school meeting very late.
Sandra's child is relieved that she's on time and Sandra's punctuality serves as a lesson to them.
Sandra's child is embarrassed by her lateness and her poor time management becomes a bad influence on them.