But before you start thinking it's because of her close friendship with Jeremy McConnell in the house, a rep for the model has said work commitments mean he won't be in London.
A spokesperson for Sam told Daily Star: "Sam will not be attending this evening because of work commitments."
Sam had earlier tweeted he was off to Huddersfield for a photoshoot.
According to bookies, former Hollyoaks' actress Stephanie is the current favourite to get the boot, but she is up against six other housemates: Gemma Collins, John Partridge, Megan McKenna, Danniella Westbrook, Jeremy and Tiffany Pollard.
Stephanie has arguably been the most talked-about contestant this series because of her close friendship with Jeremy. They shared a kiss in the house and Jeremy even confessed he'd fallen in love with her.
But Steph's been dating Sam for more than a year.
So far, Sam hasn't commented on Steph and Jeremy's blossoming closeness. He hasn't tweeted about Stephanie since 11 January when he withdrew his support from her over Twitter but insisted they are still a couple.
"I will be talking to her when she leaves the Big Brother house," he said.
"I would never end a relationship over text or social media. I want to talk to Steph face to face."
On last night's episode, actress Stephanie became upset as she chatted about Sam in the Diary Room, after housemate Gemma Collins brought up how good looking she finds him.
"I've just realised everything," she said. "I've missed Sam so much that I've had to block him out completely. Maybe I've substituted Jez for Sam as I've missed the contact.
"I don't want to look like a tease, it's not like that, I think the world of Jez."
CBB airs tonight at 9pm on Channel 5