Platinum selling artist Seal isn't afraid to plant a big fat smooch on the lips of his wife Heidi Klum, no matter who's around!!

The singer and his Victoria's Secret supermodel wife shared a passionate liplock in front of Heidi's daughter Leni at Saturday's US Open men's semi-finals in New York.

The couple's son, Henry Gunther Ademola Dashtu Samuel ... phew - take a breath after that name, was also on hand for the event. Despite looking after the kids, the famous parents were able to find time to connect with their fans by signing autographs and taking pictures.

Heidi is currently in the middle of season three of her Emmy nominated design show "Project Runway."