Viewers saw Lillie confronting ex-boyfriend Bear during last week's shopping task, breaking down in tears as she told Bear she'd been "humiliated and embarrassed" after he dumped her on TV and hooked up with housemate Chloe Khan.
Bear's brother Danny, however, wasn't buying it.
Phoning into Celebrity Big Brother's Bit On The Side on Monday night, Danny said of his brother: "He's bearing up considering that Lillie stitch up. I mean, three times he tried to get out of that relationship in that six-week TV fling and each time she pulled him back in in order to sell those clothes."
Lillie and Bear began dating after meeting on the fifth series of Ex On The Beach, which filmed in Thailand earlier this year. It's currently airing Tuesday nights on MTV.
Danny continued: "That Oscar-winning performance with the Home and Away music and the crocodile tears meant we never got a chance to say we love him. But he will cope. He's had a lot of heartache and it will take a lot more to break him."
The latter comment is reference to the fact other housemates had visits from their loved ones during the task, whereas Bear was confronted by his ex-girlfriend.
Danny previously took a swipe at Lillie in an interview with The Sun, claiming Bear had tried to end their "short relationship" ahead of entering the CBB house. "The tears were fake and admittedly it was a very good performance which fortunately didn't fool everyone," he had said.
We've contacted Lillie's rep for comment.
Lillie's entrance to the house was met by gasps from the housemates and stunned silence from Bear, who declined to say a word to her while she stood in front of him.
"This is the hardest thing I've ever had to do, I just needed to see you," said Lillie. "It's so surreal. I'm having to watch this from home. You had me with you until the car came to collect you; you left me with your family. You asked me to be there when you got home, I was supporting you 100 per cent.
"The embarrassment and humiliation I've had. This is all one big game to you, it is a joke at my expense."
Bear later broke down in tears in the Diary Room, saying: "In the long run, she would've got hurt a lot more. I had to break away from her, it's the hardest thing I had to do. I would've married her. I think about her every day but I can't be with her. It's not fair on her. I was adamant I wouldn't get with anyone else. I knew her for two and a half months, everything happens for a reason... Maybe it's her lucky escape from me. God knows what she's gone through."
Lillie meanwhile, appears to have drawn a line under her romance with Bear, tweeting last week she'd received the "closure" she needed by speaking to him.
"Hardest decision to go in the house," said Lillie. "It was for closure & that's what I got. Thank you again for all of the kind messages it's appreciated."
CBB, meanwhile, continues tonight with another double eviction. The eternally nominated Bear faces Marnie, Ricky Norwood, Sam Fox, Katie Waissel and Frankie Grande in the public vote.