Just in Time (/Bimbo/Futa)

You dragged your sister just around the corner of the gym into the locker rooms and turn on the shower hoping to clean her off. As you turn around to help her out you notice the platinum blonde hair starting at her roots and wonder how you hadn't noticed that she had dyed her hair earlier.

"Jenny quick we need to clean that cum off of you"

The only response you get is a deep sensual moan when you say cum as she scoops some off of her expanding tits and into her mouth. As you look at her she locks eyes with you until you notice a small bit of movement in her skirt.

"Jack you naughty boy, i think you are the one that needs to cum clean" as she says this the movement in her skirt reveals itself to be a large 10 inch cock. You stand mesmerised at the person standing before you that used to be your sister now with platinum blonde hair, massive tits and a 10 inch cock. You are lost in confusion until you hear something from your sister.

"Now open wide" suddenly you are shoved to your knees and the cock is being shoved into your throat. All of your practice with your dildos meant that you easily deepthroated the monster cock. She starts to grab the back of your head and forcibly face fuck you until her large tennis ball sized nuts hit your chin. You never thought your first time sucking a real dick would be that of your sisters. As her pre-cum slides down your throat it starts to feel better and better. At the same time her cock seems to becoming larger and larger within your mouth and you hear your sister say

"Faster, Faster, Faster" You want to help her so you go to grab her butt and notice that your fingernails seem to have grown and have a pink nail polish on them. Your sister pulls back and starts violently stroking her cock.

"Now its time for you to truly become my sissy sister" as she fires a massive load drenching you whole front in her thick sticky cum.