I think it’s one of those things where someone goes on to you about their new love of the gym/swimming/running or whatever and you politely tell them that they are looking great because it’s polite and what else are you meant to say? Charlotte realy craves validation from other people rather than just being happy that she feels better she wants other people to notice and tell her how amazing she is and how proud they are, she’ll take it from anyone OAPs at the gym, strangers in her phone or Sandra who works at the Aldi checkout.
Not every compliment is an actual compliment anyway. My nan always used to tell people they were looking well when.she really meant that someone had put on weight.