Eagle-eyed fans are concerned the couple have broken up for a second time, after noticing a few cryptic tweets Emma had posted to her Twitter account lately.
Seeming to hit out at her reality star boyfriend, the model appeared to brand Mario a "desperate boy", before claiming he has no respect for her. Ouch.
Earlier this week, she tweeted: "You desperate little boy." Before adding: "Respect. It's a shame some people clearly don't have it."
Taking to Twitter again today, Emma seemed to hint that Mario had been messaging girls behind her back. In another post, she told followers: "Another one to add to the collection nothing shocks me. Girls and screenshots..."
Another one to add to the collection nothing shocks me. Girls and screenshots...— Emma McVey (@Emma_mcvey_) October 15, 2015
While she never directly referenced the Essex boy in her tweets, fans were quick to link her posts to Mario. One user said: "When will he learn ... About time someone grew up. While another commented: "Omg he needs 2 grow up, but also u need 2 stop taking him back if he really is up 2 no good."
Mario, meanwhile, hasn't responded to Emma's tweet, instead choosing to tell fans he was "third wheeling" a friend and his wife. Is that a hint he is single again?
He tweeted: "Third wheeling with my mate and his wife watching Bridget Jones... New lows have been reached."
If the couple have split, Emma's latest tweets aren't the first time she has accused Mario of messaging other girls.
Back in August, the pair shocked fans, confirming their first break up with a war of words via Twitter. Mario had warned followers: "Never trust anyone... Sometimes even those closest to you are the worst."
And hitting a nerve, Emma was quick to reply: ""Trust?! Oh really, maybe I should let everyone know the truth... All you do is bring me down and put me down. This perfect boyfriend who continuously messages other girls. I'm finished."
Despite claiming she was done with their romance, fans were pleased to hear the duo had worked through their issues, after Mario and Emma rekindled their relationship last month.
Confirming they were back together, the couple stepped out hand-in-hand at a showbiz party in London and seemed to firmly be back on track in the weeks following.
Reveal has contacted a rep for Mario for comment.
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