The Twitter feud comes just days after a rumoured split.
First, fans noticed that reality TV star Mario had removed all pictures of model Emma from his Instagram account...
Then, just days later, the handsome 27-year-old posted a cryptic message on his Twitter account.
He wrote: "Never trust anyone... Sometimes even those closest to you are the worst."
Never trust anyone... Sometimes even those closest to you are the worst— Mario Falcone (@Mario_Falcone) August 7, 2015
He added a thumbs down emoticon.
Fans were quick to offer their support, with one saying: "Sounds like bad times chin up buddy x."
Another said: "You're trusting the wrong people then pal."
One follower added: "Karma's a b****."
However, Emma soon decided to have her say, too.
At first, she responded to Mario's tweet with a simple "very true x".
But after a few hours seemingly brooding on the message, Emma lashed out: "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."
Trust?! Oh really, maybe I should let everyone know the truth...— Emma McVey (@Emma_mcvey_) August 9, 2015
All you do is bring me down and put me down. This perfect boyfriend who continuously messages other girls. I'm finished.— Emma McVey (@Emma_mcvey_) August 9, 2015
She later deleted the tweets from her feed.
Earlier in the week, Emma had cryptically tweeted that she was "drained".
Mario and Emma went through a rocky patch earlier this year, but the couple had seemed totally smitten with each other since then and had been planning a future together.
Just last month, Mario had told Reveal he and Emma were looking to buy a house together, shortly after surprising his girlfriend with her gorgeous puppy Oscar.
With things seeming pretty serious between the pair, we asked Mario if he thought Emma could be 'The One' and he told us: "I'd like to think so. I wouldn't be with her if I didn't."
For exclusive competitions and amazing prizes visit Reveal's Facebook page NOW!