Jack Hill (born January 28, 1933) is an U.S. film director, noted for his work in the exploitation film genre. Hill was born in Los Angeles. His mother, Mildred (née Pannill), was a music teacher and his father, Roland Everett Hill, worked as a set builder for film studios and was an architect. Description above from the Wikipedia article Jack Hill, licensed under CC-BY-SA, full list of contributors on Wikipedia.
Spider Baby
In a dilapidated rural mansion, the last generation of the degenerate, inbred Merrye family lives with the inherited curse of a disease that causes them to mentally regress from the age of 10 or so on as they physically develop. The family chauffeur looks out for them and covers up their indiscretions. Trouble comes when greedy distant relatives and their lawyer arrive to dispossess the family of its home.