Stephanie Davis and Marnie Simpson have been feuding online ever since Steph accused the Geordie Shore babe of trying to copy her in her exclusive Mirror Online Big Brother column . After Marnie lashed out at Steph calling her “delusional”, the new mother asserted she would no longer give Marnie the publicity she wanted.But Marnie is still going, branding her arch-rival “insane” and “a mess” and claiming she’s the last human being Marnie would want to be like.And now a mate, pal of Steph has hit back at Marnie, telling Mirror Online in that as Steph’s fame rises, Marnie’s is going down.Read MoreStephanie’s mate, pal has hit back at Marnie for her comments today (Photo: Rex Features)”Stephanie’s career is on the up, Marnie’s had to sell her secrets” (Photo: WENN.com)”Marnie really needs to move on from slating Stephanie constantly. Stephanie is a busy mother and doesn’t have the time or desire to be entering in to a war of words with her constantly,” the pal told us. “Stephanie’s career is on the way up – she’s bagged herself a normal TV spot on Big Brother ‘s Bit On The- Side, while Marnie’s had to sell her soul bringing out a book spilling her deepest, darkest secrets and enter in to a war of words with Steph. “It’s unhappy in that she is making a career out of repeatedly slagging Stephanie off in her column each week. Clearly can’t be a lot else for her to write about!”Read MoreMarnie has-been lashing out at Steph (Photo: Rex Features)Stephanie had branded Marnie and Lewis’ relationship a “showmance” (Photo: WENN.com) Our insider stood by Stephanie’s original comments about Marnie and Lewis Bloor , adding: “Both girls should be pleased in that they are individually doing their own things. “Stephanie’s comments about Marnie and Lewis were legitimate and were from the heart – if Marnie can’t take in that 'cause its the truth then she should just remain silent.” It comes as Marnie re-enters the Big Brother house for a special task, alongside Gemma Collins and Nicola McLean . Marnie is returning to the Big Brother house, along with Gemma and Nicola (Photo: bbuk/Twitter)The three celebrities will be seen in tomorrow night’s episode and are thought to be staying in the house for at least two days – just in time for Stephanie’s next appearance on BOTS this coming Thursday night.Big Brother continues at 9pm on Channel 5.