How many movies have Kat Hess and Mary Jo Slater collaborated on?

They have worked on 2 movies together! Their first movie together was 30 Nights of Paranormal Activity With the Devil Inside the Girl With the Dragon Tattoo (2013) while their highest rated movie together was Bad Ass 2: Bad Asses (2014). They have not worked together since Bad Ass 2: Bad Asses (2014).