Jenn: Both
Katie: for your transform our real mom will sprout from your crotch as a human sized dick, with her face super imposed on its cock head. Your dare is for your mom-cock to think its perfectly normal.
A long tube of cock flesh sprung out from Jenn's crotch just above her pussy, it grew to 5feet long and 2feet around with basketball sized nuts. The thick bulbous head peeled back the foreskin revealing a set off eyes and the piss slit as a mouth.
Mom: oh hello girls, is it morning already? I'm so stiff and horny.
Jenn: ill say! Katie she feels amazing!
Jenn began jerking off her monster sized mother cock with both hands as Katie licked at played with the tip. When Jenn came both her and her mother screamed in orgasim as the fountain of cum blasted Katie off her feet and against the wall pinning her there. After a minute or two the cum hydrant stopped and Katie fell of the wall into the 2foot puddle of cum that filled the rooms floor.
Jenn: that was intense! Good job mom!
Mom: I should be thanking you, I haven't cum that hard since Katie was born.
Katie: I don't even know how any of that makes sense but whatever. hey Jen it's my turn, use the curse