Steph believes Nicole should have had to audition to get on Big Brother, according to The Sun.
The ex-housemate was first to be evicted from the Big Brother house after forming a close bond with Rex, and a suspicious Nicole has since questioned Rex about the friendship.
Steph told the paper: "I couldn’t believe they put Nicole in - it is so unfair.
"She didn’t even have to audition, whereas I went through hell to get on that show."
Steph also criticised Nicole and Rex's relationship as "less exciting" than a relationship between two people who met for the first time on Big Brother, such as her and Rex.
She added: "I do think Rex fancied me, there was a chemistry between us."