The challenge sees the islanders try to raise each other's heart rates by dressing up in various different costumes and performing cheeky dances.
But there was certainly some awkward silences after the results came in, revealing Gemma's heart rate was raised the most by Jacques, while Jacques' was raised the most by Gemma.
Of course, fans of the show will know that the pair are exes, and dated for eight months in the outside world.
Following the challenge, many are convinced there's unfinished business between the pair, with one writing on Twitter: "There’s unfinished business between Gemma and Jacques."
While another said: "Gemma and jacques I can’t keep screaming unfinished business."
And a third added: "Gemma & Jacques deffo have unfinished business."
Meanwhile, others pointed out that Jacques was able to raise Gemma's heart rate despite only giving her a kiss on the cheek.
"Guys if you deep that Jacques only kissed Gemma on the cheek, you will know girl is still in love with that man," said one.
While another added: "All jacques did was kiss gemma on the cheek too."
And a third tweeted: "Luca was grinding all over gemma when just ONE kiss on the cheek from jacques makes her heart race more."
At the end of the episode, Paige and Jacques could be seen privately speaking about what had happened, with Jacques suggesting it could be because the pair are exes.
"Okay if I'm going to be honest, maybe it's because we've experienced something like that before and it brought a flashback," he said. "That's the honest reason why I thought it could have been Gem."
At the end of Tuesday's ep, a preview to Wednesday's episode revealed there will be a recoupling, with the girls choosing who they want to recouple with.
"You've got the power tonight, Ekin," Davide can be heard saying. Many viewers think there could be feelings remaining between the pair, especially considering Davide's heart rate was highest for Ekin-Su during the challenge.
With Ekin currently coupled up with Charlie, Wednesday's ep will see her decide who she wants to couple up with moving forward.
We can't wait to find out...
Love Island continues at 9pm on ITV2.