The Witch's Familiar

You were having a normal life as a cat. You were a familiar to the witch who always spoiled you with treats and toys. You were a little under the weather so the witch went to make you a remedy, however something with the potion went irreversibly wrong. When you lapped it up and crawled back into your spot on your owner's lap by the fireplace... you began to shake, grow and lose your fur. The next time you open your eyes you are still on your owner's lap but are now a human, you look at your owner with wide confused eyes. Lewd Leah's Inner Self is available in this scenario!