Question: Who is Outey's sibling-in-law?
Sentence (from "Chey Chettha II"): He is noted for moving the royal capital from Srei Sonthor to Oudong, and for his cooperation with the Nguyễn Lords of Vietnam against the Siamese, which led to the Vietnamese annexation of the Mekong Delta, including the city of Prey Nokor—the precursor of modern-day Ho Chi Minh City.
Relevant evidence: No