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Mark's body continued to swell and redden while creaking and squeaking as his now rubbery skin expanded, he groaned as his shorts stretched and strained with his increasingly growing butt which soon burst free from it's fabric containment. Mark winced as he felt a sudden pressure building above his rear, a small stubby bugle started pushing out his lower back and steadily grew out while puffing up with air, it was evident that Mark was growing a tail and as it reached it's full length the tip shaped out turning into a puffy triangle.

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