It was revealed they had split earlier this week, after enduring a 'string of heated rows'.
And it has now been claimed that Dan Osborne failed to contact Jacqueline Jossa during his recent trip to Marbella - causing their fierce disagreements.
According to The Sun, the actress, who is 32 weeks pregnant with their second child, was left furious when Dan failed to reply to any of her messages, while soaking up the sun at a holistic bootcamp with the likes of Gabby Allen and Stephanie Davis.
At loggerheads: Dan Osborne reportedly failed to text pregnant wife Jacqueline Jossa (above) during his trip to Marbella - causing their huge rows
A source explained to the paper that Dan was not on his phone much, as the Spanish fitness retreat encouraged guests to take a detox from technology.
However, his lack of contact reportedly infuriated Jacqueline, who was back at home caring for their daughter Ella, 3, and preparing for the birth of their second child.
The insider said: 'Jacqueline had been trying to get hold of Dan all week at the bootcamp - she was messaging him all the time and he just wasn't messaging her back.
'It kicked off a row': The actress, who is 32 weeks pregnant, was left furious when Dan failed to contact her, while at a holistic bootcamp with Gabby Allen and Stephanie Davis (above)
'He wasn't replying to her much because he was either taking a session or joining in with one.
'That's what kicked off a huge row - she was eight months pregnant at home alone and he was busy at work.'
MailOnline has contacted Jacqueline and Dan's representatives for further comment.