Mexican Gothic by Silvia Moreno-Garcia

A 1950s Mexico City socialite, Noemí Taboada, travels to a remote Gothic mansion called High Place to rescue her cousin Catalina from a mysterious illness and discovers the Doyle family is bound to a parasitic fungus that enables mind control, body horror, and centuries of incestuous eugenics. The patriarch Howard Doyle forces supernatural submission on household members while Virgil sexually harasses and assaults Noemí under the house's influence.

This book's main concerns are; drugging, explicit sexual assault/battery/nudity, graphic body horror, incest/eugenic breeding, manipulated consent, reproductive exploitation, ritual child murder and cannibalism, severe violence and suicide.