Focus on the bulging sensation in your crotch...
From Create Your Own Story
A number of alien feelings are bombarding you all at once so you decide to focus on one and see what happens. One of the stronger sensations is a fat swelling feeling behind your womb, making your vaginal lips pucker and bulge painfully. You close your eyes and focus on the feeling, urging it to become stronger. Your stomach turns as you feel your organs shift about grotesquely, and for a moment you feel like you might puke. Instead you feel a splitting pain in your crotch as your pussy bulges and parts and you feel something slide past your internal organs like someone was drawing a gatepost out of your body. You look down and understand as you see a massive and twisted cock slide out of you, squishing out of your pussy and dripping goo on the hardwood floor. The head is pure black and shiny, the body red like blood with purple veins pulsating on it...it is both hideously ugly and the most beautiful thing you've ever seen.
You stop it at three feet but feel like if you wanted you could extend it even further. You look at it with dazzled eyes, caught up in the beauty of your own new cock. You tear your eyes away from it just long enough to look at your mother meaningfully, and realizing your intentions she begins to scream.