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Olivier Sarkozy, Mary-Kate Olsen

James Devaney/WireImage

And the kissing just keeps on comin'!

Mary-Kate Olsen and Olivier Sarkozy are certainly no strangers to serving up some PDA, and this weekend was no exception.

The 27-year-old designer and her 44-year-old French banker beau were caught smooching—yet again—while watching a New York Knicks game at Madison Square Garden on Saturday, Dec. 14.

Last week, Olsen sparked wedding rumors after she was reportedly spotted shopping for engagement rings at high-end jewelry store Neil Lane.

And while a source told E! News exclusively that the two have tossed around the idea of marriage, a second source insisted a wedding is not in their immediate future.

In fact, the source says Sarkozy is "wary" of tying the knot a second time. (He divorced Charlotte Bernard in 2010.)

"Mary-Kate is just 27 but comes across as a lot, lot younger," says the Sarkozy source. "She's clearly very excited about the chance to get married to a very successful, well-educated man, but life isn't always that simple. He's already got kids and is very happy with his status in life."

As well as enjoying a little PDA.