Attending the reading of the will should go rather smoothly, as you know you'll be inheriting it all as the sole male heir. Your older STEP-sister, however? She believes otherwise. When you give her the tip that she won't be so lucky, she decides to postpone the will reading and asks you to meet up with her the next day. You do... and from there, you see how serious she is about staking her claim on the money... by any means possible.