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. 
 
 James Devaney/WireImage.com 
 
 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. 
 
 James Devaney/WireImage.com 
 
 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. 
 
 PHOTOS: Mary-Kate and Ashley Olsen through the years 
 
 Said another insider, "They are madly in love!" 

 It's no secret that Mary-Kate Olsen and her boyfriend Olivier Sarkozy are fans of PDA. 
 
 The two have been known to get cuddly (and kissy!) in a number of places like basketball games and even airports. 
 
 Their most recent snuggle session was at New York City's The Cutting Room, where the loved up couple watched a blues performance by Ronnie Wood and Mick Taylor (both of whom have been members of the Rolling Stones). 
 
 The fashionista appeared to be wearing her signature all-black ensemble and had her hair swept off of her face in a messy bun. 
 
 She also looked fresh faced in barely any makeup and accessorized with numerous gold rings.
– Mary-Kate Olsen and Olivier Sarkozy, subjects of some of the creepiest photographs of all time, may be taking creepy pictures together 'til death do them part. Sources tell Page Six that Olsen, 27, has been seen engagement ring shopping numerous times lately at Neil Lane in LA, looking at what one source refers to as "huge" rings. All of her choices have been more than 5 carats and set in platinum, and some cost more than $100,000. "I don't think price was an issue," says another source. Sarkozy, 44, the half-brother of the former French prez, wasn't with her on any of the trips. He's been dating Olsen since early last year.