The denial comes a day after she and husband Professor Green made their first official appearance as married couple on Thursday night.
Shortly after arriving back from their honeymoon, the newlyweds visited the rapper's London nightclub INK for a night out.
Former Made In Chelsea star Millie, who recently debuted her new fringe, looked lovely in an all white ensemble that showed off her glowing tan.
She accessorised with a LuLu Guiness clutch bag and two-strap heels. Her hair was in loose waves.
During her honeymoon, Millie made sure to update her fans with a series of photos on Instagram.
The style blogger posted pictures of herself and her husband enjoying their Italian getaway.
Millie, who has changed her surname on Twitter to that of her rapper husband Stephen Manderson, showed off an array of swimwear and her enviable bikini body .
The couple are believed to have stayed on the island of Anacapri near Naples.
Millie and Professor Green married in a romantic ceremony at Babington House, Bath, on 10 September, where they were joined by around 120 guests including pop star Lily Allen and Made in Chelsea stars Caggie Dunlop and Rosie Fortescue.
The 24-year-old bride wore a vintage Alice Temperley lace wedding dress and towering Christian Louboutin peep-toe heels as she arrived at the ceremony on the arm of proud father Nigel.
The bride carried a simple bouquet of white, cream and pink flowers and wore her hair in an elegant plaited updo.