Enjoying an escape from the wintry weather in Britain, the couple, who began dating nine months ago after meeting by chance in a supermarket, were lapping up the sunshine at Sandy Lane, the resort beloved by celebrities in Barbados, after Arg whisked his other half away for a special birthday treat.
Not only did they look happier than ever, Arg, 37, looked in great shape in his swimwear following his impressive weight loss, while model Nicoline, 32, showed off her jaw-dropping figure in a barely-there white bikini.
Posting a snap on his Instagram during their sunsoaked getaway of Nicoline with her arms wrapped around him, Arg captioned the post, "Happy Birthday My Love @nicolineartursson." And a source tells new, appearances are not deceiving.
"Arg is in such a great place and he's really never been happier. He's won against all the odds and has fought all his demons," they say.
"It's been a lot of work but it's all paid off and now he's got someone who fully loves him for who he is, and appreciates the man he is today." According to the source, Arg could even be gearing up to make the ultimate commitment to his other half.
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"He's totally smitten. He's definitely looking to pop the question and start their future together," they say. "He has absolutely no doubt that she is the woman he wants to spend the rest of his life with, they are absolutely soulmates, there's no question about it.
"And seeing his good friend Mark Wright and his wife Michelle Keegan so happy and expecting their first baby, it's just a lovely sign to Arg of what his happy future might hold." Indeed, Arg confirmed in an exclusive interview with OK! last December that his and Nicoline's relationship was no flash in the pan, revealing she had not only moved to the UK, but into his Essex pad to live with him.
In their first joint interview as a couple, the pair confessed that theirs was "love at first sight" when they bumped into each other outside a supermarket in Spain, as James was headed to a gig with his band at Elliott Wright's restaurant in Marbella.
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Describing the moment that changed everything for him, Arg recalled sweetly, "I was walking to my gig. All of a sudd...