The pair, who won the latest series in the summer, appeared to part ways after six months together last week.
In a statement on Instagram, Dani told fans: "Jack & I have sadly decided to part ways. It's been an incredible 6 months, and we will always have a place in our hearts for each other, but sadly we've come to the realisation that it's not meant to be long term.
"We both plan to stay friends. I hope you'll all understand. Love Dani x"
However things quickly changed and within days they were back together.
Now sources allege that the pair are only staying with one another to fulfil their work commitments.
They have their own reality series, the Love Island reunion show plus a gig hosting the National Television Awards red carpet lined up.
A source accused to The Sun newspaper: “Their reconciliation has only been for commercial reasons, they aren’t genuinely in love and even had to rope in Danny Dyer to say they’re back together, rather than telling fans themselves.”
Appearing on Jonathan Ross' show this Saturday, Dani's dad Danny says of the pair's split: "They've had a row. They've had a row, she's got a bit emotional and I think she has whacked that [split message] up and immediately regretted it.
"You know what women are like… I'm just saying she got a little bit irate, screaming and shouting, the ultimate way to punish him maybe.
"I don't know what was going on but I can tell you now, they're sweet."
Meanwhile, Dani recently hit out on Instagram over claims she was after 'money and fame' following news of the split and then reconciliation.
She posted: "Right I'm sick to death of seeing posts on how I want money and fame? Wtf is everyone talking about. Money and fame?! Do you really think I'm that tiny minded to just want that.
"People upset me and disgust me so much on how they can judge me. Just p*ss off and be kind to people."
And Dani wrote of her short 'split' from Jack: "Just want to put all comments to bed. All I can say is I’m still 22 trying to get my s*** together and grow into a woman but doing it in the public eye is sometimes hard and scary.
"But arguments are arguments and I love him. I can only please people who want to be pleased and I am having to learn that opinions are just opinions.
"Hope everyone can understand that i am just a normal girl."
Love Island will be back in 2019 on ITV2.