It wasn’t much of a tip really, but when a bold guest asked the Duchess of Cambridge for the secret to staying slim after giving birth to two children, Kate Middleton sportingly said it was because she was constantly chasing after her two kids.The Duchess of Cambridge has been all smiles during the royal couple’s tour to India-and has occasionally let her hair down to have some fun. Anyone who’s seen photos and videos of Kate playing cricket at the Oval Maidan in Mumbai would testify to that.So, it wasn’t a total surprise when she was as candid with her conversation with Bulbul Dhar-James, a professor and fellow attendee at the Queen’s Birthday Bash in the Capital.According to a report, “We said, ‘How do you lose all the weight after having two kids?’Dhar-James told People magazine. And she said, ‘I am running after my kids!`”Dhar-James went on to ask if Kate wasn’t tired of smiling all the time, to which the Duchess reportedly said, “I’m just reciprocating. Everyone is so warm.”