This May-December romance is still going strong!

Six months after Us Weekly first confirmed they were a couple, Mary-Kate Olsen, 26, and Olivier Sarkozy, 42, got touchy-feely -- in front of Sarkozy's two young children! -- while cheering on the New York Knicks at Madison Square Garden in New York City Nov. 9.

Throughout the game, the couple openly flirted by whispering into each other's ears and rubbing each other's legs. At one point, Sarkozy surprised  the famous twin when he pulled her in close for a kiss on the forehead.

Olsen recently defended her relationship with Sarkozy in an interview with WSJ. Magazine. "Everyone has an opinion," she said of their 16-year age difference. "I find it's better to focus on what's in front of you and to keep putting one foot in front of the other."

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Three months ago, Sarkozy -- the managing director of the Carlyle Group's glacial financial services division and half-brother of the former president of France, Nicolas -- moved into a $6.25 million East Village townhouse with The Row fashion designer. "He and Mary-Kate found their perfect love nest!" a source told Us.

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Said another insider, "They are madly in love!"

This article originally appeared on Olivier Sarkozy, 42, Kisses Mary-Kate Olsen, 26, at New York Knicks Game