CBB: Cheating Bear's girlfriend enters the house and Marnie gets a surprise 'unimpressed' guest

Stephen Bear gets the shock of his life when his heartbroken girlfriend on the outside world pays a visit to the Celebrity Big Brother house after he repeatedly cheated on her with now-evicted housemate Chloe Khan. Lillie Lexie Gregg surprises her love rat beau on the Channel 5 show as part of a task – which will be aired on tonight's show (18 August).

Lillie – who met and starred with Bear on MTV's dating reality show Ex on the Beach and has previously dated Geordie Shore's Gaz Beadle – leaves her unfaithful boyfriend flabbergasted as she appears behind him, and he's not looking his best with three doughnuts on top of his head.

The blonde beauty will get revenge on Bear on Thursday night's episode as she makes her entrance as part of this week's shopping task, and looks like the cat that got the cream with a big smile across her face.

A spokesperson for CBB said that Lillie will be one of many surprise guests to visit the house this week. They said: "This week's two day shopping task will start on Wednesday – shown in Thursday night's episode. To win this week's shopping task, all the housemates have to do is complete a series of seemingly simple tasks that require extreme concentration to master," Mail Online reports.

However, Big Brother will throw in an array of distractions to tempt their eye off of the prize, which will include appearances and messages from family & friends and significant others," the statement added.

Humiliated Lillie's shock entrance into the house will no doubt rattle Bear's bones after he cold-heartedly dumped her on air and indulged in several steamy sessions with glamour model Chloe before she was evicted last Friday (12 August).

Lillie has claimed that Bear said he loved her just 12 days after meeting, and the pair were planning to get married and start a family – with the lothario promising to spend his CBB pay cheque on an engagement ring.

Bear told fellow housemates: "I need to be single! I thought I would be with [Lillie] forever, but after thinking in here, she's not the one." He added: "I haven't got time for a girlfriend."

Meanwhile, housemate Marnie Simpson of Geordie Shore fame will also recevie a surprise guest on the show. The raven-haired reality star has been enjoying a hot romance with TOWIE personality Lewis Bloor, and will be reunited with her cousin and Geordie Shore co-star Sophie Kasei.

Sophie has been watching the show and is set to stir up some trouble, with the drama escalating Geordie Shore-style on tonight's episode.

And according to insiders, it's not going to be pretty. A source told The Sun: "Since Marnie entered the house almost three weeks ago, Sophie has been glued to the show.

"She's really proud of Marnie, she loves her to pieces, they're family – but she's not been as impressed with some of the other stars in there."

The source added: "While Marnie is all loved up with Lewis Bloor. Sophie knows what he's been saying when she's not around, and she's got a couple of questions for him."

Lewis' sketchy behaviour hasn't gone down a treat with Marnie's family, and Sophie has a conniving plan to get him back. She's also gunning for Bear, with the source saying: "She's also gunning for Stephen Bear – she thinks how he's behaved is atrocious."

Watch tonight's eventful Celebrity Big Brother at 9pm on Channel 5.