The 23-year-old TOWIE star and Megan, 21, split earlier this year, but share 11-month-old son Teddy.
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Dan has since moved on with EastEnders’ actress Jacqueline Jossa, who is expecting the couple's first child, and Megan is allegedly feeling the pressure.
A source told heat: “A 23-year-old man was arrested on suspicion of assault in South Woodam Ferrers on Monday 10 November. He was later released without charge.”
Friends revealed Megan is struggling to adjust to Dan moving on with Jacqueline, also 21, and doesn’t think he’s the nice guy he’s made out to be.
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The source continued: “Megan is at breaking point. Dan makes out he’s the perfect role model, but she thinks he’s far from it.”
Speaking to a British magazine earlier this year, Dan said: “It’s a really difficult situation. It’s not easy for Megan.
“I’m obviously in the middle but I’m trying to do the best I can for her, Jacqueline and of course Teddy.
“We are trying to work through it all together.”
Dan and Jacqueline have kept the details of her pregnancy private, and have chosen not to reveal the sex or her due date.