Brian made his way quietly tot he centaur, but as he reached for the grooming brush Mike turned and blinked, staring. "Who are..." The centaur looked around, then back, and saw the brush. "Brian? Did you change again?"
Disappointed that he had been unable to deal with the centaur asleep, Brian decided he might as well use the curiously distant memories of his friendship with the human this creature had been. "Yeah, Mike. I wanted to be older, and somehow it happened."
Mike chuckled and twisted his upper torso around for a better look. "You won't win any beauty contests, for sure, but you sure got some improvements between your legs! Do you feel OK, now? Still want to finish me into a horse?"
Brian walked over and sat on Mike's rump and patted the equine thigh. "Don't you want o see what it is like? Being a centaur is OK, I guess, but being a horse would be totally new. Life as an animal! This is just a game, anyway. You should go as crazy as you can. Tomorrow we'll probably all wake up in Tye's living room after some kind of mass dream." He ran the brush across Mike's hide, causing the hair to darken a little more.
Mike took a deep breath, feeling the magic ripple warmly through his hind leg. Being transformed was a very sensual experience, not only pleasurable to experience, but oddly appealing mentally as well. Maybe the stableboy's conversation was part of it, but Mike had a nagging feeling that he really should be a Shire stallion, that his centaur form was only a halfway point. The erotic portions of his transformation had also created some interest in Brian, interest which had been pretty silly when his friend was the equivalent of a ten year-old, but now looked more practical. He flushed a little, but decided it was a game, and what the hell? Brian had been handling his nether regions half the night. "Um, Brian? I don't want to freak you out or anything, but could I touch you? I, well, you got me really aroused earlier, and now I would like to try some things with you."
Brian laughed. "No way you are gonna fit that horse cock anywhere in me!"
"No!" Mike flushed bright red, then realized Brian was having fun at his expense. "I meant, well, holding you, maybe masturbating you or, uh, sucking you off." He looked away, mortified that he had actually said that.
"Sure thing!" Brian got up and threw his arms around Mike's human torso in a warm embrace. The centaur was startled at first, but then drew his former friend into a hug and slid his large hands over dirty, but smooth human skin. Their mouths connected, and the two shared a rather wet and awkward kiss. Brian pulled back and grinned, then started to slide his slick, sweaty body against Mike's larger chest and belly. He was pounding erect, and felt a pleasant pulsing through his entire body.
Mike shuddered as he also became fully aroused, and was mildly surprised to feel some slight resistance as his hands slid over the previously smooth human legs. The homely teen he was engaged with bore no resemblance to Brian at all, even though he knew it was the former elf, but even as he watched the boy's face altered again. He was slightly older now, a wisp of a mustache forming on the upper lip, and the first dustings of hair showing up on his chest.
The stableboy lay back, spreading his legs to reveal an even more impressive cock rigid and starting to protrude from a heavy foreskin. He held on to Mike's hands and drew the centaur down so Mike was bent at the waist. When Brian was all the way down, Mike's face with just over the swollen cock - not by accident, he knew.