I'm going to be strict with my son about our budget
What do you think that your son is doing to go overbudget?
He spends too much money on video games
You need to have a talk and explain to your son that he needs to be more concerned with the budget. Don't get angry or accusatory with him, be understanding about his needs also.
I'm not angry; it's not like he needs everything anyway.
I think that as long as you guys can talk calmly about it, you will have some good results. It is expected that as a family, you can agree on the budget.