Who are you writing to, Mom?

Tino: Who are you writing to, Mom?
Mom: A friend.
Tino:  Ah-fend?
Mom:  Yes.Tino: Do they get offended easily?
Mom: Who?
Tino: Your "fend."  Do they get ah-fended easily?  hehe
Mom: Huh?
Dad: Hehe. I see what you did there.