Tyler continued to thrust in and out of the male sex doll's tight silicone asshole, feeling pleasure like nothing he had ever felt before. Jeff, despite being completely unable to move, also feels his brother's cock reach shockingly far into his butt, stimulating every nerve possible. Both Tyler and Jeff are completely lost to the sensations they are feeling. Soon Tyler's cock reaches through to Jeff's soft belly, poking the soft synthetic flesh with every thrust.
What both boys were unaware of is that Jeff's 4 hour transformation timer had just passed. Tyler, who was imaging himself fucking a cute girl's pussy instead of this boy-doll, barely noticed as the object mounted onto his cock slowly became lifelike. Jeff's ass became slightly warmer and his features began to shift back to his old body. However, totally succumbed to pleasure, Jeff didn't realize he had motor control of his limbs again.
After a few more minutes, Tyler could feel himself close to the edge. He braced his cock one more time before thrusting as deep as possible into Jeff's warm boypussy, cumming hard. Jeff, feeling his brother's warm seed coat his insides, also shot a huge load from his untouched dick, which now was fully fleshed out again.
Both boys took a few moments to recover from that. It was Tyler who realized what had happened first.
"Jeff, what the hell? Was that you?"
Jeff, completely embarrassed at the shameful act he had just participated in, could only say, "Yeah bro."
"How did you do that?" Tyler said.
"There's a program on the computer. I promise this will never happen again." Jeff said.
Tyler frowned. Although he knew what they had just done was wrong, the experience was just too good to pass up. "That's ok big bro. I kinda liked you as a sex doll better".
Jeff nodded confusedly. "What do you mean...?" He noticed that Tyler had already gone to the computer and was opening the Chronivac program. "Wait, stop!"
Tyler only had time to look around briefly before feeling his brother try to wrestle the mouse out of his hand. With no other option, he clicked on a bright red button that said 'PREVIOUS TRANSFORMATION'.
"Tyler, don't do this. Nooooooooooo!" Jeff felt the familiar sensation of his body stiffening again, as he began to lose his grip on his brother's hand. Unable to fully speak, he could only moan helplessly as Tyler picked his dollified body up and sat him upright on the bed. His skin began to tan again and hair changed to hazel brown.
Tyler looked at the details of the transformation closely now that Jeff was no longer a threat. He saw he had 4 hours to work with before Jeff turned back, but desired a better solution for his program. Having some decent computer skills due to a large amount of gaming hours, Tyler got to work. Jeff could only stare helplessly as his brother typed away.
After a short wait, Tyler turned to his motionless brother, grinning ear to ear. He knew Jeff could hear him despite the totally blank stare on his sexdoll eyes.
"Ok listen up bro. You are going to become my part-time personal sex doll. Most of the day, you will be your normal 16 year old self. However, I've programmed special phrases that transform you to and from a sex doll that only I can use. In the next minute after I say that phrase, any details I say about you will also come true as well as the length you will be forced to stay as a doll. Don't piss me off or I might just make it permanent! Let's try it now! Become human!"
Jeff immediately began to feel his nerves fire again, his features changing back into his old self. He wanted to tell Tyler how much he hated him, but didn't dare speak in fear of what he might do.
Tyler decided to try out a new sexdoll form for Jeff now. "Ok Jeff, *Lose Yourself*. You will now become