The Negotiator

So, my husband made a deal with Jesse: Behave for a certain period of time and we WON'T cancel his upcoming birthday party.
"A week, right?" Mick says to Jesse. "No arguing, no whining, no fighting."
Jesse nods his head. "I can do a week," he tells his dad.
Deal done, Mick returns to his magazine.
A few minutes later, Jesse pokes his head back into the living room.
"Dad?"
"What, Jess?"
"I think we'd better make that four days."