Here is how the conversation went between the kid and his parents right before the killing.
Son- "Mommy, Daddy, can I please have a party tonight and invite all my hung friends."
Mommy and Daddy- "No you little prick, you left cock snot shots all over our bed at the last party."
Son- "Wait right here for a minute, I need to run to the garage."
After the killings, son banging mommies corpse-
Son- "Oh yea, yea, ohhhhhhh this feels so good."