The tiger is a huge thing, bright orange fur and dark stripes, white underbelly and long whiskers. She's on all fours, but is almost as tall as Ty - a real monster! Ty's last wish made her hopelessly want him.
The tiger's muzzle reaches down and tiger-kisses his exposed underwear. Ty sees the girls out of the corner of his eye blinking in surprise, but he can't help himself. He pulls down his underwear revealing his changed tiger cock and his own white fur on his belly.
His eyes go wide at its strange shape. He's seen himself naked plenty of times before, and seeing this spiky red snake in place of his regular penis is a bit of a shock. It feels great, but -
Then the tiger's muzzle touches the tip of his new penis, and she licks him.
He shudders as she licks his whole groin area more. He puts his hands on her shoulders and groans. Ty's mind is awash in urges, but thoughts still stream through: "No! Stop it! I don't want to be at tiger!"
But there's nothing he can do about it. He disengages from the tiger, already partially transformed from the oral sex he was getting: His pants rode up on him, showing socks. His shirt was restricted and tight. His shoes were painful to wear. He gasped for breath, and vaguely hoped the clothes would stop him from changing too much before he was completely tiger.
Ty and the tiger danced a little bit, a communication barrier mixing their intentions up, but soon Ty was behind her, and her tail was up. He ran his hands along her flanks and made fists in her fur. His new penis was right there, and clumsily found the right spot.
He never felt so good in his life. He never felt so embarrassed. The girls behind the glass were getting a show, all right - and laughing up a storm. Ty gritted his teeth in the pleasure of the huge tiger's wet snatch sucking on his great big tiger cock.