The wrong one to get the letter

Chapter 6

"Austin,
16th Of November 2019

Dear Marco And Dean,

Maybe I could get a pet. Outside the cafe I work at is a stray adorable puppy. Maybe I could adopt it? I'm not sure. Well anyways, you, Marco, have Dean to keep you company anyways. I doubt you'd need a pet. But do you have one? I'm now curious. I also doubt you're a piece of charcoal. You're an angel. Both you and Dean. Dean is made to be an artist, you know? He's so good! I love his work! You could say I'm a fan. :)
Anyways, thank you for everything, especially since you are not forced to be writing back. I do not really know why you keep doing it. But thank you.

Love,
Iris

P.S.: Don't you think 'Good angel' is a bit too extra? Angels are nice."

"...She doesn't know..." Dean said, staring to nothing. Marco laughed with his son's reaction. "We should tell her..." Dean looked to his father dead serious. "Yeah... why don't you go write a letter in which you explain it to her?" Marco asked. Dean nodded and left. Marco chuckled before turn to his desk and take out some paper and a pen and start writing his reply...