The 31-year-old shared a scenic snap of Dave looking out at the water followed by an all too cute video of the duo playing paper scissors rocks to determine who would have to swim first.
"Rock, paper, scissors. Loser jumps in," she captioned the video.
We can't help but wonder if they're back together or just the most civil and caring exes we've ever seen.
Dave reappeared on Sam's Instagram recently in a snap of him, his brother and the actress out on a stroll.
"Fun time with my bashy babes❤️"" Sam wrote.
Days later Sam shared a clip with her dog, tagging Dave in the footage.
"Swimming lessons with Greg," she captioned one clip, which shows her wading into the ocean while holding the dog she shares with the 27-year-old.
In a recent interview with TV WEEK, Sam had nothing but praise for ex of three years.
"Dave's amazing person and that's never going to change," she said. "It wasn't an ugly or messy break-up. It was just two people who love each other dearly as friends, and we promised to look after each other."
Speculation the couple were on the rocks began back in July, when the former reality TV star took to Instagram to mock the viral Tiktok 'couple challenge.' She added the hashtag "31singleandfabulous" and tellingly, Dave was nowhere to be seen.
Soon after, a representative spoke to Sydney Confidential, sharing a statement that read: "Sam Frost and Dave Bashford are no longer in a relationship. They remain great mates."
Want your own fairytale romance? Sign up for eHarmony here.
This story originally appeared on our sister site Now To Love.