The Apprentice star 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 (07) 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." Trump Sr has eight-month old son BARON with current wife MELANIA, and the tot will become an uncle aged only one. Vanessa adds, "They'll be more like brothers, or brother and sister."