'Mormon Wives' producers are firing back at "Vanderpump Villa" star Marciano Brunette ’s claim that paperwork doesn't bar him from suing them ... TMZ has learned. According to court docs obtained by TMZ, Jeff Jenkins Productions -- the company behind the Hulu reality show -- said Marciano's lawsuit should be thrown out. As TMZ previously reported, Marciano sued 'Mormon Wives' cast member Demi Engemann and Jeff Jenkins for defamation. Marciano claimed he consensually hooked up with Demi ... only