Mrs. Hudson was born and bred from upper class stock. She came from money, she married money, and her only child was going to marry money. Her sole heir was certainly not going to disgrace the family by marrying some commoner! Yet rumors reached the mother's ears that her head-strong child of barely 18 was infatuated not merely with someone beneath their status, but one of the estate's hired help. The Hudsons could simply fire that employee, but then the rebellious child might simply elope with them sooner. No, this "threat" to the family needed to be taken care of by other means.
Mrs. Hudson wasn't willing to stoop to murder or kidnapping, but witchcraft? It's all about who you know and what you can buy, and she knew a literal witch. The witch promised the spell would transform the employee into a thematically-appropriate non-human form. Mrs. Hudson foolishly thought that would surely end the torrid love affair, nor did she imagine the unexpected consequences...
Which of the estate's employees shares a mutual attraction to the heir or heiress?