The former X Factor singer admited worries about her body on the most-recent episode of the Channel 5 show, fleeing from the pool area while the other housemates are in the water.
Chloe retreated to the bathroom, prompting fiancé Stevi Ritchie to chase after her and ask what is wrong.
"I'm feeling really insecure about being overweight," replied Chloe.
Stevi reassured her that she looked beautiful, but Chloe declined to return to the pool area. Instead she went to the Diary Room, where she said she felt like a "freak" because the housemates were all drinking and dancing but she couldn't join in because of her sobriety.
She also said Stevi's main concern appeared to be getting more drinks at that moment in time, rather than Chloe.
During her time on X Factor, Chloe had told Digital Spy she was happy to be inspiring fans when it came to image, saying: "Mainly [fans have] said that I'm a positive influence and I give them body confidence, because as you know several people have been commenting about my weight."
Chloe and Stevi did a couple's boot camp together in August, before entering the house. Chloe lost 7lbs, taking her weight to 8st 4lbs, accrding to reports.
Stevi, meanwhile, dropped a stone at No 1 Boot Camp. He said afterwards: "Obviously Chloe is completely gorgeous, so I wanted to make sure that I looked as good as possible for her! The camp was hard work but I enjoyed myself and I can't get over the transformation in my body - I've never felt better."
Chloe hasn't had an easy time in the house. She admitted last week that her sobriety had made it difficult to join in with housemates at times, comparing it to manic depression as some days she just wanted to stay in bed.
She's also admitted to Stevi that she's a "bundle of nerves" and she doesn't want to burden him with her concerns, so she goes to Janice instead, which has left Stevi feeling left out
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