Luca 100% knows.
he made a comment about her last name right before she made a rude comment about his last name. He was trying to make out that he’d guessed who her dad was I think but he lacks the subtlety and intelligence to pull it of.
then again when they were having their one on one chat. He brought the conversation up around sports and getting on with her dad. He knows full well.
I reckon he’s making a beeline for Gemma because he reckons she’s well placed to win (being a celeb offspring). I get major bad vibes from Luca. There’s something a little narcissistic, calculating and unpleasant about him. I think his turning on Andrew was a glimpse of that nasty side, I reckon we’ll see a lot more of it before the show is over.