Sarah only told one other person about her departure: Amber. They didn't meet or anything, however; Amber left the mansion after the whole Mason debacle to avoid seeing her mother and calming her. Sarah simply told her through the text, including the matter to support Vivian and kicked the third wife out.
Amber merely replied with [We'll see], but that was already good enough. Sarah didn't really care whether Amber and Vivian would team up for sure, but the idea of it stressed out the third wife was enough to make her forget the pain in her leg during rainy days.
Yes, it was a rainy day when Sarah left the mansion. The day when she usually stayed at home because her bad leg would start to throb. But on that day, there was nothing she wanted to do more than leave the bitter memory behind. She had destroyed the last remaining memory of her mother in that suffocating house, so there was no more reason to stay.
