Not much was seen of their friendship on Love Island, but Anton Danyluk and Harley Brash appeared to be close as they left an ITV party together with his girlfriend Belle Hassan nowhere in sight.
Making their way out of ITV studios in London on Wednesday, at one point Anton was seen pulling his mate in close while he tenderly kissed the top of her head.
In another image he could be seen leading Harley - who was wearing jogger bottoms and a cropped vest - around with his hand placed on the back of her head.
There's no suggestion the pair are anything more than friends.
However, We-Vibe's relationship expert and psychologist, Dr Becky Spelman, believes his cosy display should be a 'red flag' to Belle, who went nuclear when he kissed Anna Vakili in a villa challenge...
"At first glance, they look like girlfriend and boyfriend, or a couple of mates on a friendly evening out. Looking a little deeper, however, there are some worrying signals," Dr Spelman tells Mirror Online.
Of Anton's 'protective-looking' behaviour, she says Belle should "certainly be concerned."
"Most men who display such behaviour with women are sexually attracted to them and are responding to a very primitive instinct which tells them to show the world that they are 'taken' and unavailable to other men," the We-Vibe relationship expert adds.
"If his feelings towards Hayley were merely friendly, there would be no reason for him to engage in this sort of display."
