You continue pushing your squirrel member into the female squirrel, accompanied by lots of ecstatic squeaking. As you do so, her fur starts becoming thinner, and her tail is shrinking back into her body. Not disturbed by this, you happily continue mating until the former squirrel has gained so much size that your tiny member can't even touch the sides of her vagina anymore. By now she has lost most of her squirrel features and is a small and hairy human, complete with hair atop her head. Even without your further interference, the changes fulfill themselves until all the body hair is gone and she has re-attained normal size. The creaking sound which you previously started noticing now turns into a loud snap, the branch breaks under her weight and she falls to the ground. "Ow...I'm OK", you hear her shout at the best of her ability. You leap off the tree onto the ground and sit next to her. "Thank you for releasing me from that form, little squirrel...apparently this was the trigger required to undo the transformation. However, yours doesn't seem to be undone." She puts her hand on the ground, you climb on and she lifts you to face level. "As a token of my gratitude, would you like me to help you change back as well? Well, after I find some clothes that is", she laughs. "So what will it be?"