In the past, your girlfriend has talked about what it would be like to have a dick. Ever since she first brought it up you have not been able to get the thought of her with a cock out of your head. You end up acquiring a special, magical tea that will make her grow a dick. While she is reading a book one day you make her the tea and wait for the effects to kick in... It doesn't take long before she is saying she feels a little weird. She lifts up the blankets on top of her and looks down in shock and amazement. Throwing the covers off she reveals that she has grown a dick! You weren't expecting it to work that fast! The girlcock she is now sporting is on the smaller side, but you still find it incredibly hot. Your girlfriend demands you tell her what did you do and so you explain how the tea you gave her is what made her grow the cock. Not only that, but one of the side effects is insatiable horniness, something she finds out as soon as she touches the cock. It's written all across her face just how good it feels to stroke her new dick. Then, her moans and horniness grows and before your eyes her new girlcock gets even bigger! You're almost as horny as she is, watching as she strokes her dick. She encourages you to jerk yourself off along with her. She knows that you want her dick so bad, but as punishment for tricking her into taking the special tea, you won't be allowed to have her first orgasm or her first cumload with this girlcock. But, she will let you watch. She finds it incredibly hot watching you jerk off to her like this. Soon, her cock is growing yet again! How strong was that tea! The feelings of pleasure keep on increasing within her as she keeps on stroking this now huge cock of hers. After the two of you continue to stroke she tells you that she is going to cum all over herself. She wants to soak herself in her own cumload. And she wants you to watch and cum at the same exact time.