All of a sudden Paul felt very hot. He didn't need Nathan to encourage him to get out of his clothes. As he was getting undressed he didn't notice that fur was starting to cover his entire body. Nathan took his shirt off and Paul noticed that he had a nice covering of fur and his beard was getting thicker. His hair was quite a bit longer cascading down past his shoulders, and his eyebrows seemed to be getting thicker as well. Paul was completely naked by this time and Nathan looked him up and down.
"Damn you're turning into one fine animal".
'Wait',Paul thought,'is it me or his voice getting deeper'.
Then Paul doubled over in pain "Oh shit, what's happening to me"?
"Don't fight it dude, it'll be easier when you just go with the flow and let it happen"
"Grrlet what happen?, what are you talking about?" Paul noticed his voice was also deeper and strangely it arroused him
"Grrr Dude look in the mirror at us"
Paul looked at Nathan and himself and noticed they were both covered in very thick shaggy fur (Paul was a black color while Nathan was a golden blonde) "Oh My GOD!!" Paul screamed which was more of a growl "What the, how di.."
"Grrrr you drank the mooshine, it brings out our feral side, ourgrrrr wild side. Grrrrit did a good job on you. You're a fine looking grrrrwerewolf" Nathan than ran his claws through the thick fur Paul was now sporting
As frightened as Paul was, it was also exiting him as evidenced by the pre-cum dripping from his now changed wolf cock.
"Grrrrroh god, this is grrr the grrrr only part I fucking grrr hate ARRRRRRRR"
Paul looked to see a tail busrting out near Nathan's furry ass. It was a major turn on to him and he was very hard as he watched Nathan go through the final changes. About that time Paul's own tail grew out, it hurt like hell but at the same time animal lust kicked in just as Nathan therw back his head and howled
"AAAARRRRRRRRROOOOOOOOOOOOOOOO"
Nathan looked at Paul as he joined him in the howling, knowing he had found his mate Paul looked at Nathan and desired him as well.