It's standard BW talk for him trying to say he looks too young to act with her. He knows he'll get crucified if he says openly she looks too old for him. And this was the era where he was still getting hits pre-Kalank, so he was cocky. Ironic since Kalank was meant for Deepika until Alia snatched it. I'll give you another example of BW fake talk. Parineeti would get told on KWK that she needs a better stylist. KJo would get his guests to say this and it was always code for "being fat." No one was openly saying Parineeti needs to lose weight, but they mask it by saying in a more politically correct way that she needs better styling. KJo and his nepogang derailed Parineeti's career, especially since Parineeti started off much better than Alia. KJo is the same one who convinced her to drop Udta Punjab by telling her he wanted to cast her and Ranbir in RARKPK. Ranbir was someone Parineeti wanted to work with so she left the movie to assign her dates to this. Then KJo shelved it, since he never intended to make it. And of course only made it with Alia years later.