Satan's Baby Doll (1982)

Antonio Aguilar, the smack-shooting scion of a line of castle-dwelling creeps, lords over his manor in a most disturbing manner. He beats broads, goes nutty for nuns, shoots up his catatonic brother's pain medicine, and keeps a stash of corpses in the cellar. His wife, Marina Hedman, has just kicked the bucket, and her ghost has come back to wreak havoc as Satan's Baby Doll (1982). Possessing her daughter, Jacqueline Dupré, ma sets out to snuff out any and all who had sex with her—and that's a lot of people, seeing as mommy rode the pony of every man around. Oh, and she also did some munching on the resident nun! It's sacrilicious fun! Eurosleaze fans will recognize a number of plot elements from Malabimba (1979), which also features a castle, a catatonic uncle, and a heavenly, horny Mariangela Giordano as the naughty nun. That film shares a writer and producer with Satan's Baby Doll.