"So which of these you young men want to go first?" Chuck said grabbing his junk. I didn't say anything hoping Nate would go first so I could watch, which he actually stepped forward to the massive bear. The bear grinned. "You look brave, I hope you won't wimp out on me. Now I need to ask are you a top or bottom?" Nate began to think what his fantasy he wanted to come true with this bear. He took a hard swallow and said, "bottom" quivering under his breath.
"Well, human brother I don't think I caught your name?" He stood over Nate as his cock stood right at his eye level. Nate looked at the huge cock almost hypnotized. The bear noticed and grabbed it pulling it closer to Nate. Nate flinched a little looking like he wasn't sure about doing this after all. "Here, touch it. It won't bite, it's only inanimate after all." Nate lifted his arm a little hesitant at first, but slowly started to rub the head of the cock. I could only know how it feels so I asked, "how does it feel like?" As he began to observe it he came with his best answer, "It's warm, it feels soft and rubbery." He stopped describing it as he started to hug it. The bear showed some surprise, but he did allow it for a couple seconds before pulling my brother off of his junk. "Nate, my name's Nate"
"Alright now that we introduced ourselves. We might as well start with the fucking." Nate began to get undressed until he was completely naked standing right in front of Chuck. Nate paused and looked at Chuck's dick. "How the hell are you going to fit your dick into my ass?" The bear man grabbed his junk again and started to push it on Nate. "One size fits all." He grinned showing his sharp teeth towards your direction. Nate now more confidant he bent over and waited for the bear's meaty cock.
The bear began to thrust into Nate's ass as Nate's eyes went wide and face turned red. He slowly pulled out as his cock began to get more erect. He repeated this process as he started to fondle Nate's dick and balls. Nate dropped his hands onto the floor and began to breathe heavily, and sweat excessively. The bear began to thrust faster and passionately, while his cock began to stretch Nate's asshole bigger making him scream in excess. The bear showed almost no sign of stopping or ecstatic emotion he seemed pretty straight. Nate began to cum first leaking onto the bear's hand who took it and began to lick it. He then rubbed it all over Nate covering him in his own cum. He seemed like he was starting to wrap up thrusting into Nate. The bear bean to push harder and faster now showing a face of erotic passion. Without warning he began to cum into Nate with some spilling onto the floor mixing with some of Nate's cum. Both gasping Nate tried to pull out, but something wasn't letting him do it. The then laid down bringing Nate with his cock onto his belly.
There I saw some changes take onto Nate. His skin started to turn brown making him seem like lost in the bear's fur. His arms and legs then shrunk into his skin. He watched as you did as his body began to bloat out rounding out as his head began to merge with his body making him unable to yell. His head expanded into a cone shape, then his hair and teeth fell to the floor as his face began to disappear, and before you knew it your brother, had just turned into the bear's penis. Your brother, now began to retreat into the bear's sheath only showing his head out. He looked like the bear's other penis, which made you a little nervous what the bear might do to you. Just when your penis began to turn hard the bear stood up, smiling at you "Your brother was a fine partner. I can still hear him, he seems content with his new form." The bear grabbed his junk containing Nate. You just stood horror unable to run. "So, now it's your turn, so are you a top or bottom?"