"Nooooo!" Jack screams in muffled voice under the bear mask. He keeps screaming but his voice becomes more and more animalish.
After a few minutes, Jack's bear mask starts moving. Its mouth opens and lets out growl, then its eye lids open. You see orangish brown eyes of his. Jack's change is completed, he now is a real bear!
You still feel Jack's body is growing. It's time, it's time to explore Jack's new body. You quickly get naked and climb on Jack's huge body again in the 69 position. There - Jack's cock is peeking from his sheath, fully erect. It's huge, 14 inch in length and well over 3 inch in diameter, leaking clear and syrupy precum. Jack is in heat obviously.
Without hesitation, you take the tip of Jack's cock in your mouth as much as you can, and start jerking it off.
Jack's growl gets louder and louder. You hump Jack's fat belly and jerk his cock like crazy, being rewarded by more and more bitter yet sweet precum. Jack sees your white ass moving up and down, and the sight makes him even hornier. Jack's fat cock starts inflating into incredible proportions, and you take it in your mouth even more.
Jack finally roars and lets out a bucket load of cream into your waiting mouth. It's really thick but slides down your throat. Your stomach is filled with Jack's cum, then something happens to your stomach - you feel it expands. You don't even realize you shot the load on Jack's fat belly, too busy in gulping Jack's cream.
Jack's cock finally stops shooting cum. Your belly is visibly inflating with his cream. Jack and you then fall asleep.