Two that comes to mind right away that hasn't already been mentioned. - Brooke disconnects the ventilator to prove that Stephanie faked her heart attack ("For God's sake Stephanie, die! Prove me wrong and die!") (B&B) - Luke and Noah's first kiss (ATWT)
I don't know why everyone is so surprised. Brad Bell did this exact same thing a few years ago, but then it was Ridge and Brooke. He climbed into bed with her when she had been taking some medicine (I can't remember if it was sleeping pills or something else) and proceeded to have sex with her even though she clearly stated that she wanted him to stop and leave. It was swept under the rug that time too.
I wonder if Brad Bell actually thinks his show is good when/if he watches it nowadays. I certainly don't. Recently there's been a whole lot of old B&B posted on Youtube, and I've been watching that and been amazed at how good this show once was and how far it's fallen....
It's a bit ironic really, since drinking is one of the few things that Stephanie never could use against Brooke throughout all their years of fighting. She even said once to a social worker, when she was trying to take Hope and R.J. away from Brooke, that Brooke was not a drinker.