Fashion business owner Jasmine, 27, said she had been attracted to 21-year-old Kavan’s “aura” when speaking to Maya during the final.
Viewers were surprised early in the series when Kavan, who was sent in as a bombshell, was revealed to be the brother of day-one contestant Aidan Murphy.
Fans said it was reminiscent of popular Prime Video show The Summer I Turned Pretty, which focuses on a love triangle involving two siblings.
During the final, Kavan said he “couldn’t be luckier” to have been in the villa with his brother and to have met Jasmine.
Simba, who turned 25 in the villa, told Maya his first plan with nurse Angelista once they left the show would be to celebrate her 25th birthday, which is on Tuesday.
For the first time in the history of the UK series, only three couples were in the final after several shock twists rocked the villa during Sunday’s episode.
Firstly, ex-islanders returned to vote for the couple they felt should be dumped from the island.
After the votes were counted, Mica Harris and Samraj Toor were forced to leave having received the most.
Before they left, the pair were tasked with picking one other couple who they felt should also leave.
It was revealed at the start of Monday’s episode that Yasmin Hadlow and Tommy Stagg were going to miss out on a place in the final.
Afterwards, Tommy comforted Yasmin, telling her: “I’ve got you and that’s all I care about.”
