It's creepy to catfish a family member.
David is overprotective of his teenage daughter, and he fears that she is too naive.
David wants to make sure his daughter won't let someone take advantage of her.
David has a serious conversation with his daughter, explaining to her that she needs to be very careful when dealing with guys.
David makes a fake online profile, using the pictures of an attractive guy and starts messaging his daughter to see how she'll react.
David's daughter is thankful for the advice and promises her father to be cautious.
David's daughter finds out what her father has done and is creeped out by his actions and disappointed in him.