After quietly dating for several weeks, Delta and guitarist Matthew Copley can no longer hide their love - packing on the PDA while enjoying a romantic holiday in Hawaii over the New Year.
'They couldn't keep their hands off each other...if I didn't know better, I would have mistaken them for honeymooners,' an onlooker tells New Idea.
'They were holding hands and kissing constantly - they were clearly completely wrapped up in each other.'
The unrestrained moments of passion not only left plenty of fellow Kanuai holidaymakers turning their heads, the duo also sparked speculation that Delta may even have a baby on board!
'Delta couldn't seem to keep her hands from cradling her tummy and Matthew kept touching it too - it definitely send alarm bells ringing,' says the source.
Adding further fuel to the fire, Delta, 33, kept her midsection conspicuously covered by sporting a pair of white pants over her swimwear.
Pals are hoping Delta has finally found the long-lasting love she's been searching for, having fallen in love with Matthew when he joined the Aussie starlet on her national Wings Of The Wild tour.
With rockstar good looks to match his jet-setting lifestyle, Matthew's music career sees him flying around the world to rub shoulders with the rich and famous, sharing the stage with the likes of The Weeknd and One Direction.
The nephew of Lizzy Morrissey and her agent husband Mark Morrissey, and the best-friend of Aussie chart-topper Conrad Sewell, Delta's new man may run in A-list circles, but his love life to date has been decidedly monogamous - previously enjoying long-term relationships with insurance professional Tess Bettenay and fashion stylist Rebekah Wall.
Now comfortable enough to post photos of each other on their respective Instagram accounts, the duo appear ready to take their romance public, with Matthew even posting a video of the two 'jamming' together - highlighting their shared passion for music.
While it remains to be seen whether Matthew turns out to be another fling or the real deal, Delta appears happy to let fate take its course.
For the full story see this weeks issue of New Idea - out now.