Could you be more specific about what lines we have to do?
Also, to get the fourth image, you have to tell Hermione that you should start the search on the Forbidden Forest. When she gets caught by the Devil's Snare, you have to try to help her both times and you'll get the image.
First you choose "Did you check between your tits?". Then don't peek and finally, after getting the other girls info you choose "can I see your tits?".
