The trio don't believe that there are any real emotions between the pair, claiming that Luke S preferred other girls in the house but had settled for "second best".
"They're not bothered. There are no feelings. Feelings can't get hurt when there are no feelings," said Lydia.
She asked: "Can you imagine going with someone who said that they fancied someone else when they first came in and you were blatantly second best?
"[Luke] just went for who would have him."
Commenting on the split in the house between two clear groups, Lydia added: "Big Brother is the only way it will change. By switching it up and saying, 'You're going up for talking about nominations', or, 'You've won immunity'. That's the only way it will change. It's working too well for them."
Lydia and Deana Uppal are the two housemates facing eviction this week. Commenting on the nominations result, Lydia said: "It's not such a bad thing to be up. At least I've got some activity.
"I don't want to be a glider who gets all the way to the final without knowing if people like me."
Big Brother continues daily on Channel 5.
Big Brother Photo Gallery - Day 20:
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