The Gambino crime-family fiancé of TV “Mob Wives” star Ramona Rizzo got smacked with a 15-year prison sentence yesterday for his role cultivating marijuana in a Staten Island drug-trafficking ring.

The raven-haired Rizzo, 33, looked on tearfully from the front row of Brooklyn federal court as fiancé Joe Sclafani, 47, was put on ice — then dashed off without discussing how the stiff term would affect their wedding plans.