But not all the housemates think Kay's feelings are genuine.
Kay confessed her connection to Brooke in the house last night, having previously admitted she wasn't sure about her sexuality.
In tonight's show, Sîan Hamshaw and Cian Carrigan dissect the situation in a chat in the bathroom.
"Brooke and Kay had a talk and Kay basically said she's attracted to her and stuff like that," Sian revealed to Cian.
"That's random, how does Brooke feel about it?" he asked. "I don't think Kay would do anything in here to pursue it."
Sian agreed: "Nor do I, which is why I don't want them getting caught up. I can't help but notice how Kay latches on to anybody... when Anamelia were here she were always with Anamelia.
"Then after that she were with Lewis G then when she fell out with Lewis G and weren't really talking to anybody she did that thing about leaving, and suddenly she's turned to Brooke."
A sceptical Sian concludes: "I can read anybody, anybody I've met I've been able to read what they're like or get them as a person. I just can't get over the fact that she's an actress."
Also in tonight's highlights, housemates take on their very first shopping task involving a LOT of chickens, while Kenaley Amos-Sissons EXPLODES at Lewis Gregory.
Big Brother 2018 airs tonight at 10PM on Channel 5.
Lewis G and Lewis F face this week's latest eviction, taking place live on Friday night at 10PM with host Emma Willis.