It isn't scripted at all..like another poster has said the contestants are constantly having conversations with producers and psychologists etc, to see how they feel about everyone in the villa and then when they want to have a chat with somebody about a something, they have to let the producers know so they can make sure all the cameras catch it. So the producers will ask if they can make sure they have the conversation on the balcony or by the fire pit etc..
I don't think the producers are forcing Anton and Belle to do anything..before Belle went in the last thing she knew was the public loved Anton, they are both desperately playing up to the cameras, thinking we are all in hysterics at the pair of them..when really we can all see straight through the act. It's embarrassing!!
My DH hit the nail on the head when he said Anton reminds him of Julius Caesar, with Belle not saying a word rubbing and tickling him while he sunbathes and chats to people on the beanbags..all she needs now is some grapes to feed him!!