The Ex On The Beach star made a shock appearance in the house on Thursday night (18 August) to confront Bear on why he dumped her on national TV and hooked up with housemate Chloe Khan.
It was incredibly emotional as an upset Lillie told Bear she'd been supporting him and standing by him until he publicly "embarrassed and humiliated" her, saying: "This is all one big joke at my expense."
Reacting via Twitter after the episode aired, Lillie, 25, simply said: "Hardest decision to go in the house... It was for closure & that's what I got. Thank you again for all of the kind messages it's appreciated."
Lillie had been dating Bear since they met while filming Ex On The Beach 5 in Thailand earlier this year, and they'd seemed a strong couple when he entered the house.
But it didn't take long for Bear to tell housemates he didn't think Lillie was the one and he wanted to be single. He then hooked up with Chloe providing racy scenes including a sexy massage (done by a bra-clad Chloe), a steamy shower, and an incident behind the closed toilet door that elicited a LOT of moans from Chloe. (She's denied they had sex.)
Lillie told Bear, 26, in the house: "This is the hardest thing I've ever had to do, I just needed to see you… 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."
She entered the house a part of the new shopping task which challenged housemates to complete simple tasks without being distracted by familiar faces.
Bear remained silent as Lillie spoke to him and simply shrugged in response to her speech. But when she left the house, he headed to the Diary Room and became tearful.
"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," he said.
"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."
CBB continues 9pm on Channel 5 when two housemates will go home in a double eviction. Those facing the public vote are Bear, Lewis Bloor, James Whale, Sam Fox and Ricky Norwood.