It's harmless banter, Louis loves Kelly. he missed her last week, he kept quoting her cute American accent.
Kelly does not dislike Louis, she is right, he should never of said to Frankie he will amount to nothing.
I know Frankie is rubbish, bit harsh from Louis.
Talk about kicking a person when down. Louis can open his mouth a bit to fast, without thinking of the impact it can have on a individual.