After his mother went upstairs, Jeff quickly went out the back door of the house and climbed the tree they had in the backyard. From there it was possible the person taking a shower inside the bathroom as long as the window was open, and he knew that his mother used to leave it open when she took a shower. Another advantage is that the darkness prevented him from being seen outside in the tree.
With skills developed since childhood, Jeff climbs the tree quickly and silently, positioning himself for a better view. He watched as his mother rinsed her body with the hot water, and her dick growing hard again. Without hesitation, she began to caress her dick with her upper hands while inserting the fingers of her lower one into her pussy. As she did so, her dick pulsed and slowly got bigger and bigger.
Jeff's mother, when her dick was just over 10 inches, changed her tactics, showing a new elasticity she had acquired, sat on the edge of the bathtub and bent over to suck her own dick. She did it naturally as someone who is already used to doing it. Jeff was able to have a privileged view of his mother's pussy from this new angle, for a short time as the lips at the entrance between her legs fused and sealed it, soon loosening, forming a sack and being occupied by her ovaries transformed into testicles. While she held the dick in place with her upper hands, and continued the self-blowjob, she held his balls with her lower hands. Jeff's mom's balls inflated like she was blowing balloons.
Impressed by his mother's evolution, Jeff didn't realize that greater changes were occurring in reality around them, nor that he himself had already begun to be affected.
Jeff's mom's balls grew until they were the size of avocados, with her then moaning as she took her now 13 inch dick out of her mouth and cummed. From the direction she was facing, her cum partially flew out the open window while the rest painted the wall below white.
Watching his mother masturbate and cum, Jeff rubbed his hard cock through his clothes against the branch he was holding, and let out a small moan. He quickly covered his mouth, but it was also strange because the voice that came out wasn't his. It was at this time that he noticed the extra weight in front of him and looked down. Jeff found his shirt fuller than normal and, feeling it, confirmed that he now had breasts, a total of eight with size differences exactly the same as his mother's.
"Who's there?" Jeff heard his mother ask as he looked out the window, still unable to see him in the darkness. He didn't respond and remained silent in place, but one of the branches he was holding couldn't support his weight and broke, causing him to lose his balance and fall, landing in the bush below. Even with his fall cushioned, he hit his head on the grass hard enough to knock him unconscious. The last thing he heard before he lost consciousness was his mother screaming "Jess".
Without knowing how long he was unconscious, Jeff woke up and discovered that...