MailOnline has contacted the pair's representatives for comment.
Over the past week, the California-based model has been posting a series of sexy bikini selfies on her Instagram account while on holiday on the Caribbean island of St Barts.
And while controversial singer Thicke's face isn't pictured in any of the snaps, but one photo shows a man's legs while relaxing with a view of a golden beach and the sea.
The international star, who recently divorced from long-time partner and actress Paula Patton, 39, is scheduled to perform at the Saint Lucia Jazz Festival on Sunday.
Despite the age gap, the loved-up couple struck up a romance months ago, and they have been photographed together with his four-year-old son, Julian, from his relationship with Patton.
The brunette beauty, who is signed to top model agency IMG, sparked rumours that they were dating last year when she posted a selfie that she claimed was taken in the singer's bed.
Another photo showed her posing in front of a mirror in a skimpy Halloween outfit in another roomoth images were later deleted from the Instagram account.
Thicke isn't a stranger to rubbing people up the wrong way: his international hit Blurred Lines has caused more than its share of scandal, thanks to its offensive and anti-feminist lyrics.
And there was also his talking point of a performance with Miley Cyrus at the MTV Video Music Awards back in 2013, when the then-20-year-old singer twerking up against him as he sang.
- Daily Mail