Do we know why the father is angry? This might be an important factor in figuring out the solution to this problem.
Actually, I don't see the problem at all here. It sounds like the man has had a change of heart (like Rikki could if she doesn't lose that number) and has come to the conclusion that yes, he is working you too hard. Whatever his reasoning may be, it would be best to ask him or find out some way or another what's causing him to be angry.