Step-siblings Hazel and Juan have been having behavior problems lately, constantly treating each other like shit and bringing chaos to their home. Hoping they'll learn some manners, their parents send them to their step-nana Sofie's house and she's not especially thrilled about it. Despite being part of their family, this bodacious veteran is distant, strict, and very harsh. Hazel and Juan hate being there, but secretly, they both know this is just what they need to correct their attitude. However, little do they know there are some secret and kinky aspects of Sofie's persona. For instance, Sofie loves watching her step-grandson while having a shower or teaching her step-granddaughter how to play with her pussy. Soon, they'll become part of Nana's filthy experiment. They will have to have sex with each other while she watches and gives them orders. Finally, they'll realize that this was Nana's plan all along: a raunchy threesome with her favorite step-grandson and step-granddaughter!