Luke is about to kill Percy, you and Luke are siblings, he thinks you will be in his side, always. Just as he was about to stab Percy, annabeth(you) showed up. Annabeth: “I came as soon as i heard” Percy: “whaaattt?” Luke: “annabeth!” Percy: “she’s been listening this whole time? Dam!” Luke: “annabeth! Thank the gods someone who understands what I’m struggling here to do”