The 'Ordinary People' hit-maker, who met the Sports Illustrated model on his the set of his 2007 music video 'Stereo', claims they're ''sexy'' and ''touchy feely'' introduction during her leading role as his love interest, makes her anxious he could be tempted by other video vixens on set.
He told Cosmopolitian magazine: ''[Does she get jealous?] Yes - she knows how we met! But I'm very disciplined. I know where home is. We made a spoof video recently of her spying on me on a shoot and making sure I wasn't getting too frisky!''
The couple are expected to marry in Lake Como, Italy later this month after John popped the question during a romantic trip to the Maldives in 2011, however the R&B crooner claims they never had a traditional first date.
Speaking of their first encounter, John explained: ''It was kind of touchy feely and like a very backwards introduction - before we knew each together, we were feeling each other up! So that helped break the ice. It wasn't a proper date, but it was sexy.''
Meanwhile the 34-year-old suggested he has been well behaved since dating the brunette beauty, as he insisted he hasn't penned any songs about infidelity on his new album 'Love in the Future' released next Tuesday (10.09.13)
He said: ''Not all my songs are autobiographical,but you tend to write about what you're going through. There are no cheating songs on this album! I had a few on the first.''