Even with how infuriating being treated like a baby could be, Kevin couldn't deny that his wish was being granted. Sure, Cassie was now a baby alongside him (probably a bigger one considering it was unlikely she could crawl), but all of his needs were going to be taken care of for a decade or two at this point, so he might as well go with it. In a wet diaper, Kevin closed his eyes and was able to find some sleep.
When he woke up, he noticed his mother looking over him with a smile on her face. "Time to change my sleepyhead's diaper; at least it's not a stinky one." His mom picked up him and placed him on the changing table, quickly unsnapping his onesie and untaping his diaper. As she was cleaning him with a baby wipe, Kevin watched his penis slowly rise. 'You've gotta be shitting me.'
"Oh, are you getting hard again? When you're a big boy, you won't be so sensitive and you can take care of this yourself, but for now, it's mommy's job to take care of this." She took off her shirt, letting her huge breasts slap against her stomach, even with her bra on.
'Wait, is she really going to- no.' Kevin tried to ask his mom what was wrong with her but all that came out was pleasing-enough babbling, so she just gave him another saccharine smile and placed his cock in between her breasts, swallowing it completely.
She lifted them up and down, up and down, each downthrust making a loud smack against his body. "I always heard how good it was to give my baby big stickies, but I couldn't imagine how happy it would make me until the first time I wrapped my boobies around your pee-pee. I love it when other mommies are impressed with how big you are and ask if they can give you a titfuck as well. You'll have a lot of women loving you, Kevvy. Daycare workers will jerk you off when it's naptime, leaving your diaper stinky and sticky. Your kindergarden teacher will teach the other students how to make babies as you ride her. If I have to hire a babysitter, I'll likely come back to her on top of her, her fat tits slapping her in the face as she begs you for more. I'll have to make sure nobody takes you away from me, wanting you to be their special boy, but it'll be fine as long as she gives you back to me with a smile on your face and her womb filled with a grandchild." His mom was talking in an erotic breathy tone as she speeded up the movement of her tits. "You're going to have a very happy life, Kevvy, even when you're no longer mommy's little boy."
Kevin couldn't resist any longer. With a loud gurgle, he came into his mother's tits, some of his cum spilling onto the top but most of them staying in her cleavage. His mom put her shirt back on, now getting even tighter thanks to the cum on her breasts. "I'll have you play with Cassie for a bit, then it's time for you two to have Mommy's milk."
Kevin offered no resistance as his mom took him into her arms and took him downstairs.