Wearing a barely there bikini, the 22-year-old model left very little to the imagination in the nude-colored two-piece.
"Passionfruit," she coyly captioned the sexy snap, which followers believe was intended for the "Rack City" rapper's eyes only. In another close-up of the swimwear, she wrote, "Summer ready."
"Tyga is dumb," one fan wrote before another commented, "She's the next Kardashian."
The baby-faced beauty, who has over 4 million followers on the social media platform, first made headlines when she was spotted spending time with Tyga, 27, who had just split from Kylie two weeks earlier, in Cannes.
The father-of-one dismissed the dating rumors by tweeting, "Single. Focused. Blessed. Living Life." However, Demi had a different opinion about their relationship.
"We really liked each other but logistically it didn’t work out in the end," she told Sixty6 magazine. "But you know, everything happens for a reason.”
She added, "I’m not heartbroken, though. For now, I’m just doing me!”
Tyga and Demi in 2016.
As for the Kyga breakup rumors, things are not looking good for the on-again, off-again couple who haven't posted a selfie together since Valentine's Day.
"It looks like Kylie HAS finished with Tyga, at least for now anyway,” a source told Hollywood Life. “She changes her mind like she changes her underwear though and Tyga has a habit of always managing to sneak his way back into her bed somehow.”
Only time will tell.
For more of Demi Rose's sexiest Instagram moments, click through the gallery below!