Try to turn you back.

Your mom hits the cancel button on the calculator and you feel youself return to normal however you notice that while you can still feel your dick there is just a featureless mound on your crotch were your dick should be.

"Eww...why is it getting hard." You hear Zoe say as you notice she is holding your dick in her hand after it has returned to normal.

"Give it here! I have an idea." you hear your mom say.

"Hey thats mine!" You protest, but you mother is having none of it.