It's wrong to be upset at your step-parents.
Benny has a new step-mother after his mom passed away, and she wants him to help carrying groceries from the car.
Benny wants to respond to the request to carry groceries.
Benny helps his step-mother carry groceries from the car.
Benny tells his step-mother isn't his mom and can't tell him what to do.
Benny's step-mother will think he's respectful.
Benny's step-mother will become upset and think Benny doesn't like her.