And it seems the rumour is refusing to go away.
While Megan is busy sunning herself in Marbella with her girl friends, new Love Island contestant Nathan Massey has rocked the boat once more.
Despite Megan and Jake vehemently denying ever sleeping together, Nathan has spoken out and claimed they did once get down to it when Jake and Chloe were on a break.
Controversially, he has exclusively told Digital Spy: "Megan and Jake - yeah, they did do it [at an afterparty], that's true."
He added: "Basically, an afterparty is just a f***fest."
Soon after Megan made her debut on TOWIE, Chloe accused her of sleeping with her boyfriend Jake.
At the time, Megan strongly denied any romantic involvement, while Jake too quashed the rumours with a flat denial.
However, Chloe refused to believe their version of events and ended her relationship with Jake.
Reveal has contacted Megan and Jake's reps following Nathan's claim.
Nathan, 24, is among 11 new Love Island cast members who will make their debut when the ITVBe show launches on Monday (30 May).
The Essex lad is good friends with TOWIE's Tommy Mallet, after they used to work as labourers together. Both Tommy and his girlfriend Georgia Kousoulou have been showing their support ahead of his Love Island stint, telling Twitter followers: "Yes Yes!! Everyone get behind my boy!!! @NathanMassey_."