Now that Tiffany's pants were no longer in the way, her cock was free to grow to its full length. Shooting forward and further out of its sheath, Tiffany grew pale as her new organ became painfully erect. At its full 2.5 ft length, Tiffany couldn't believe how turned on she was. Her balls swelled with cum, and when Tiffany shifted her body she could feel the cum inside moving about.
Katie took a step back, a little scared, a little amazed, but also increasingly turned on herself. Something about her friend's new body was really hot. Tiffany's clothes started to tear as her body grew. Her once fit form was bloated into a more barrel-like shape. Her stomach, which was covered in brown and gray hair, swelled.
And as quickly as it started, Tiffany's transformation stopped. She stood before her friend as some kind of weird donkey hybrid. She had donkey ears, a donkey tail, a donkey pot belly, and a donkey dick. A very, VERY hard donkey dick at that.