Donald Trump to be a grandpa

Donald Trump is set to become a granddad for the first time -- his son and daughter-in-law are expecting their first child.

Donald Trump Jr. and his wife, Vanessa, are set to become first-time parents early next summer and plan to keep the sex of their baby a secret.

Vanessa says, "Everyone's very excited but if you mention the 'grandpa' word (to Donald Sr.), he might not be so excited."

sfgate