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But now they might have spotted the biggest betrayal of all. Yep, worse than the cheating, or the flirting, or the unsolicited games of truth or dare...
Fans have suggested that Liam Reardon appears to have given away Millie Court's precious Sagittarius necklace, which she left him as a reminder of her when packing his bag.
They came to the realisation when watching a scene between Hugo Hammond and Amy Day, where it appeared that Amy was wearing the necklace around her wrist.
"NAAAHHH SHES WEARING MILLIE’s necklace as a bracelet ?!??!????," one fan wrote.
As another penned: "Swear they girl Hugo kissed had on Millie Sagittarius necklace on around her wrist #LoveIsland".
A third shared an iconic picture of a dismayed looking Shaughna Phillips and wrote: "The UK after seeing Millie's Sagittarius necklace on Amy's wrist #LoveIsland".
"FOR MILLIE TO WEAR HER SAGITTARIUS NECKLACE EVERYDAYYYY AND GIVE IT TO LIAM AND LIAM TO LOSE IT OR GIVE IT TO ANOTHER GIRL IS SOOOOOO RUDEEEEEEEEEE," raged somebody else.
Last night Liam planted a smacker on Lillie Haynes, despite still admitting he was confused over what he wanted. Meanwhile, Millie remained loyal to him in the main villa.
While it is, of course, most likely that Amy just has a similar bracelet with the word Sagittarius on it, fans are understandably predicting the worst, based on Liam's behaviour so far.
Amy was also spotted wearing the bracelet when she walked into the main villa with Hugo - which also suggests it's unlikely to be Millie's (erm, unless she's really ballsy).
This isn't the only sign of disrespect that fans picked up on as they watched the boys in Casa Amor.
Fans were also disappointed in Tyler Cruikshank after seeing Clarisse Juliette wearing pink silk dressing gown similar to Kaz Kamwi's in Casa Amor.
Kaz had gifted Tyler the gown as a memento, much like Millie's necklace.
Boys, when will you learn?
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