"The Dark Lord  will want to ensure you’re being kept as far away from Harry Potter as possible," Severus told her brusquely. "I will be teaching you Occulemancy. Hopefully you are a quicker study than your idiotic compatriot, Potter. There is a certain facade we must maintain, and we will be unable to achieve that without you being able to hide certain memories from Him. The nature of this conversation, for example." 