Before you could think of any your girlfriend rolls over and grabs the pill bottle, "why dont we try more" as she grabs a brown pill for hers self and a pink pill for you.
Without thinking you both pop them in your mouth and wait for whats to happen.
Your girlfriend starts to change just like guy you did but it seamed more disgusting watching from the side, hearing her crack her neck and moan as her muzzle extended until she looked just like you, in fact exactly like you as you and her both notice she was now male. The whole time you were sitting there watching waiting until you start to feel the changes start but they never did or at least you didn't notice.