Hathaway told Ellen she initially thought the man was hitting on her, but soon found out, NOPE, he was just a personal trainer at the gym looking to drum up a little business. His cardinal mistake was not telling the new mom that she "looks great," instead inquiring if she was looking to "lose the baby weight."
This is a good time to mention new mom etiquette. Whenever a person tells you that they've had a baby, you say "you look great." As Hathaway says, "doesn't matter if it's true. If somebody says 'I had a baby 13 years ago,' you're like 'you look great!' That is what you do, that is the etiquette."
Pay attention, folks. In fact, "you look great" is a wonderful thing to say to anybody, anywhere, anytime. Again, it doesn't matter if it's true. It never doesn't work. For example: "Here is your coffee." "Thanks, you look great." "You've stepped in some dog shit." "Ugh, gross, but you look great." "Do you swear to tell the truth, the whole truth, and nothing but the truth?" "I do, and by the way, you look great."