I actually like that idea, and I think it happens in the book (I'll have to go back and look), even if it isn't stated specifically. I think it will add to the tension and anger that Ron supposed to feel and really دکھائیں what he's most worried about.
I don't think they make out topless but I know that Ron is wearing the locket and thinks Harry and Hermione together and it makes him mad. I know they kiss یا something in the movie because the director کہا Harry/Hermione shippers will be pleased with a scene in the movie.