Omg. I cannot understand how Amy thinks Luke has a lot of making up to do!!
He went to the bar to buy 4 expensive cocktails, and she uses that opportunity to tell them about the mould comment, without giving any sense of the context of the chat. So he was completely correct when he said they had a negative attitude from the off.
Amy looked so much nicer in the photo. She had her teeth done, but chose for them to look like dentures. Why do people do this??