Brittany Mahomes UNMASKED as 'fake and disloyal' to Taylor Swift, as red flags ... trends now

It was the moment that seemed to cement Brittany Mahomes as Taylor Swift's latest celeb bestie.

The newest WAG in the Kansas City Chiefs' ranks, Swift stepped out at Wisconsin's Lambeau Field stadium last December to support her tight-end beau Travis Kelce wearing a striking red coat.

Ever on the hunt for 'Easter eggs' clues left by the pop superstar, eagle-eyed Swifties immediately pointed out that the jacket appeared to belong to Mahomes, wife of quarterback Patrick.

And true enough, the ladies soon seemed inseparable, cozied up in stadium stands, downing shots for the jumbotron and dancing together at debauched afterparties.

Swift even appeared to have allowed Mahomes into her highly select group of gal pals when, in November, they were pictured on a night out alongside Selena Gomez, Gigi Hadid and Sophie Turner. 

In February, Mahomes posed in barely-there bikinis for Sports Illustrated, telling the magazine of her shock at being chosen for the shoot. 'Never in my wildest dreams,' she said, in what many perceived to be a sweet reference to one of Swift's most famous songs.

But now insiders are questioning the strength of that friendship, with some suggesting Mahomes has been rather more keen than Swift to present the public with an impression of closeness.

The first signs of trouble in pal paradise came with Mahomes's appearance in an advertisement for Kim Kardashian's underwear brand, Skims.

Posing alongside Patrick and their two children in cozy Christmas pajamas, Brittany shared the promotional pictures to her personal Instagram last November, saying: 'The holidays start with Skims.'

Of course, Swift is locked in a years-long rivalry with Kardashian that shows no signs of cooling. Only last week, Swift's new album contained an apparent 'diss track' aimed at Kim.

Now, sources tell DailyMail.com that those close to Swift thought it 'super strange' that Mahomes did the campaign.

'It truly showed how loyal she is to her friends. And Brittany chose money over friendship, which says a lot,' the source said.

As for the closeness of the pair, the source said that Mahomes is only 'acting like Taylor's BFF' because she 'is desperate to be known' and wants to be seen as more than 'a trophy wife to an NFL star.'

'She has tried so hard to insert herself into Swift's circle. She has wanted to be relevant for so long and finally found her in,' said another source who suggested Mahomes's Skims 'betrayal' is very revealing.

'She has too many red flags and people are starting to see through her fake and bitchy persona,' that source said. 'She is an opportunist who is clearly not a girl's girl.'