Andy was a good and loving father, raising his daughter Jiselle on his own after the tragic death of his wife and her mother two years earlier. His sister helped with the awkward 'talk' soon after she started puberty but it was always going to be a difficult time for the pair of them. Quite how difficult was only starting to become apparent.
Robin passes a test given by two apparent deities and gets "rewarded." The reward doesn't make women fall in love with him but it may as well have. What happens when his younger sister accidentally gets triggered?
During Christmas vacation a mother, daughter and son are turned on by the daughter's older boyfriend. While the mother gets seduced by the boyfriend, brother and sister get it on after they see what is happening between the two. The son thinks his sister is sleeping on the couch and seduces her, then finds out it was his mother. On orgy ensues when the daughter and her boyfriend come in to see what the noise is in the living room. What a Christmas Vacation!
Two siblings forced to share a room grow apart while being close together. To rekindle their bond they relive times from their childhood, when they were young and carefree. This leads to them becoming very comfortable with each other. Possibly more than intended.
Philip arrives home sporting a black eye earned defending his mother's dubious honor from schoolyard taunts. His grandmother gives him a bath and more. Then the nice lady next door teaches him a few tricks. Grandma comes back and teaches him some more. Finally, his abundantly endowed mom arrives and he shows her what he just learned.