Julia woke up when a tightness in her nightshirt made her uncomfortable enough to wake up. Sliding out of bed carefully to not wake her husband up Julia made her way to the bathroom to see what had caused the problem. When she flipped on the light and looked into the mirror she was shocked to see that nothing had changed with her nightshirt to make it tighter but her breasts had expanded underneath it causing it to strain against the buttons holding it together. Unbuttoning the top buttons relieved enough pressure to stop it from being painful and exposed a deep line of cleavage. Julia was amazed at the change guessing that she must have gone up at least 2 cup sizes if not more.
Before Julia could fully strip and try and get a clearer measurement she heard a stifled moan come from somewhere in the house and she left the bathroom to investigate. She walked down the hallway cautiously to look downstairs but stopped in front of Henry’s room when she heard the noise again coming from inside. Peeking into the room through the partially opened door Julia saw not just one of her sons but both of them. Illuminated by the dim light of Henry’s nightlight Julia witnessed the shocking display of her eldest son impale himself on the massive cock of his baby brother. The same cock Julia herself had pleasured after wiping it of piss. Julia should have stopped what she was seeing but couldn’t bring herself to interrupt the erotic display. She felt flushed watching Steve try his best to ride the superior manhood of his brother and she caught glimpses of that manhood bulging out his stomach as he got deeper onto it.
Julia’s shirt began to tighten again and the top button still in use began to strain against the slowly expanding breasts beneath it. She had gotten wet from arousal and began fingering herself to the sight before her. She nearly came herself when she saw Steve finally reached the base and both her sons climaxed. She stopped her fingering to be completely focused on the sight of her eldest son be bloated with cum from the super serum enhanced baby underneath him.
Julia panicked when she saw Steve get out of the crib and come towards the door and she turned away in a hurry. The rapid movement from Julia made the strain too much and two of the remaining buttons on her nightshirt popped of and flew down the hallway. The noise of the buttons bouncing across the floor stopped Steve long enough for Julia to quietly hide the the storage closet next to Henry’s room. Steve unsure of what he heard waited a little then fled to his room to go back to sleep. Julia returned to Henry’s room her now very large boobs exposed by the missing buttons. She entered the room and closed the door to not make the same mistake Steve had and then went straight for the crib. Henry laid sleeping their peacefully with no sign of what just happened except for one thing. Between his little legs his huge cock rested still covered in cum and slime. Steve hadn’t properly cleaned and diapered the baby and he laid their exposed. Julia would have too change that.
Julia’s tongue would not have been her first choice of cleaning instrument a day ago but just like Steve the mutagenic properties of Henry’s cum had affected her judgment and left her licking up and down the cock cleaning it of all grime.
“How could Steve have left his brother a mess like this I am going to have to teach him how to properly clean Henrys cock” thought Julia before thinking “What am I thinking”. Neither thought stopped her though and she soon had the cock as clean as she could. When she was finished a new problem arouse that being the cock’s now erect state. Julia wouldn’t be able to get a diaper over that erection so she would have to take care of it first. Julia was tempted to do a repeat of Steve’s earlier act but thought it better to test out the new breasts she had grown. They could now fully wrapped around the immense cock and cover almost half of its length. Had it been any normal cock it would have been buried fully but Henry’s was anything but normal.
Lubed up with saliva Julia started the process of getting the cock to ejaculate squeezing her breasts up and down the shaft as she licked at the head. Henry was still sensitive from his previous climax and it didn’t take long to blow his load that landed all over his mother. Julia let the cock coat her upper body but was careful to not get the cock too messy.
Still covered in cum Julia diapered Henry barely fitting the cock and balls underneath. She left the room and went to bed forgetting to clean herself and got in bed still covered in cum with her husband.