I don't know the name of it...but it was something on Bravo one day.
It had these 2 teenage British lesbians who were secretly in love, but there parents said they were too close, and wanted to separate the girls.
The girls then had this sick story they lived their lives by or something, something mythical, involving this stone one of the girls had. Abiding by the story, they walked out into one of those hedge-maze gardens, in this formation:
Lesbo Teen 1 - Mom - Lesbo Teen 2 (walking left across the screen)
The first girl drops this stone (its a sparkling gem) and points out how beautiful it is, and how lucky they are to 'find' it. The mom bends down, and girl 2 whips out a stocking-wrapped-brick and starts swinging it at the mom's head. Then the first girl starts helping the second, and they beat the mom to death, and you get these freakish scenes of the mom crying out for help with blood covering her face.
In the end, we get this great stuff, about how its a true story.