It wasn't necessary to add that the reason why she forgot she murdered the witch was because she drank too many of the potions she tried unsuccessfully to hide from him over the years. He knew about her habit. Knew about it and despised it. While he could understand the attraction to drinking too much alcohol, he had never been one to take illegal potions. That all started thanks to Rabastan. He was always the devil on her shoulder whispering in her ear, telling her to drink more.