Bhoonte go and fck ur mind first... Dude whats wrong with that if that girl call him DAI.. DAI symbolize senior but actually Tihar ma tika lagai dine DAI.. I have heard wife callin her hubby a "Dai" in Gaun..About age - What do u think about Donald Trumph dude? .. So far I believe you have done or thought nothing wrong.. But make sure that girl doesn't have problem with age difference.. And if you get answer NO, do not ever humilate her.