When you wake up, the morning sun is beating down on your face. You yawn, breathing in the damp cave air. But as you sit up, you realize something had changed. You look down at your naked body and gasp.
Your once smooth, clean feminine form is covered in dirt and hair. All along your arms, legs, even your back and ass there are thick, dark brown hairs covering your skin. Your chest seems larger, and once you pull some of your new "fur" to the side, you can see just how big.
Your breasts were a respectable D cup. Now they're like something straight out of a porno magazine. H cup, with nipples as thick as soda bottle caps. And the same color as prunes. You touch one, and moan, not expecting them to be so sensitive. The thick bush covering your slit is soaking wet.
Hair creeps up your neck, and around your face until it looks like you're wearing some kind of fuzzy scarf. But the hair is attached to your body. Your ears are longer, though you don't notice as you're busy playing with your new parts. Your nipples leak pale liquid, which you will later realize is milk.
The ape-man returns, carrying a crude bowl made from rock. In it is water. He sniffs the air, catching your aroused scent. More than happy to help, he approaches on all fours. He bends you back against the cave floor and licks your face. You do the same, and spread your legs for him. You barely notice that he seems... different somehow. You can't place it, but something about the ape-man has changed.
But as his large, animalistic cock penetrates your folds, you don't care. You moan, your voice becoming deeper with every vocalization of your pleasure. While he's busy pounding on you, your hands tweak your large nipples until milk is flowing freely.
You've lost count of how many times you've come. With one last thrust, the ape-man cums inside you. Just like last time, he has you lick the residual cum from his body. Your tongue is larger, but this goes unnoticed as you savor the salty taste of your new master's spunk. Not aware if will continue your changes...