Sam and Dean were horrible babysitters like really bad, sure they were able to keep the kid alive and well but they sucked at knowing what the kid needed.

They were currently running around the store trying to pick up anything Dean or Sam knew that the baby needed for the weekend we are babysitting him for.

But just to their luck the baby started fussing and they were panicking not knowing what to do cause you and disruption to all the other shoppers.