Final answer:
Moira met Sebastien through a series of events and encounters, including Sebastien escaping from prison and reaching out to Moira. Their relationship is portrayed as passionate and mysterious.
Step-by-step explanation:
Moira met Sebastien through a series of events and encounters. One of the significant moments was when Sebastien escaped from prison and reached out to Moira, requesting to see her before he left town.
It is mentioned in the text that one of the old servants, Jacob, brought the news of Sebastien's escape to Moira.
Due to the secretive nature of their relationship, Moira never mentioned Sebastien's name, creating an aura of mystery around him.
The dynamic between Moira and Sebastien is contrasted with Moira's previous romantic encounter with Bobinôt, which now seems insignificant in comparison to her deep love for Sebastien.