A close friend of his mother, Lady Danbury, intervened, helping Simon find his voice and gain the confidence to eventually confront his father.
The episode reveals why Simon is so determined to never marry or have children through a series of flashbacks: Bridgerton s01e02
Simon's mother died during childbirth after finally delivering a male heir. His father, Lord Hastings, was only concerned with the boy's ability to carry on the family name and showed no grief for his wife. A close friend of his mother, Lady Danbury,
in any room I entered. Come. You can speak. I understood you well enough. And I will help you to overcome this stammer of yours. . Scraps from the loft Bridgerton S01E02 Recap - TV Tropes A close friend of his mother