The part that Theo really disliked about these lessons were this part, he could see recent memories dragged up, Verity sitting staring at Montague's sleeping body, a few choice word of their conversations. Then he managed to gather himself enough to push Severus out.
He closed his eyes, tucking away his memories, before looking up, waiting for either instructions or being told to try again. Which ever it would be he'd do better, he'd improve. He always did. It wasn't a fast process but it was a steady one - and one he was determined to see through to the end.