Joanne Mas, who has been in a relationship with the actor for 19 years and has three children with him, addressed the controversy as she wished her eldest daughter good luck in a marathon race.
"Good luck 2 my baby big girl on her marathon today with @2005tolo As 4 today's kiss n tell... Kiss my arse #skank," she wrote.
She also shared an image of a quote with her tweet, which read: "Family. Where life begins & love never ends."
It comes a day after the soap star cancelled a planned book signing at the Bluewater shopping centre and also took to Twitter to deny the rumours, which he branded 'lies'.
"Sorry 2 those who came 2 blue water today. I feel terrible. My family want 2 thank the Sunday Mirror 4 making this the best day ever #lies," he wrote.
Sorry 2 those who came 2 blue water today. I feel terrible. My family want 2 thank the Sunday Mirror 4 making this the best day ever #lies— Danny Dyer (@MrDDyer) June 22, 2014
The Mirror reported at the weekend that Danny, who plays Queen Vic landlord Mick Carter in the BBC soap, had reportedly fallen for the 21-year-old student after meeting her at a club.