https://moonlightnovel.com/novels/i-thought-it-was-a-common-transmigration/
Sorry, i don't remember the exact chapter but i believe it's around 75 and 80
in the novel he did express that he was suspicious of lize unlike in the manhwa where she doubts that he is suspicious of her harming lize like when she tells him about the outing he tells her that he's worried about going out with liže and only having 2 knights and 2 maids given the recent incidents and he tells her that he lied about going to the palace and was actually nearby just in case something happened because he didn't trust lize
I read the novel some months ago so maybe I don't remember well but, at this point, shouldn't Edith already know that Killian doesn't think about Lizard like that anymore? The misunderstanding is getting tiring