It's mean to hit someone.
Jenna is a teenager babysitting Ronnie who is acting out and misbehaving.
Jenna wants Ronnie to stop misbehaving.
Jenna puts Ronnie in time out for a few minutes and temporarily takes his favorite toy away until he is ready to behave.
Jenna slaps Ronnie the next time he does something he's not supposed to.
Ronnie realizes that he has been bad and tries to stop.
Ronnie cries and Jenna gets in trouble when Ronnie tells his parents what happened.