"I don't want any money", Muffet said, "I just want a cute little boy to play with."
She continued feeding him. Then she took a pink dress and showed it to Asriel and put it on him. "You just look like the perfect diaper princess"

I don't want to do this.

"But I won't let you go", Muffet giggled. She picked him up and placed him on a net where his hands and feet were tied and was forced in such a position so that his diaper was showing. Muffet began rubbing his stomach.

He blushed and messed the diaper.

Muffet held her nose and giggled, "Ahuhuhu~, Looks like the pastries have done their job quite well." She patted the front of the diaper and gave a little spank in the back, squishing the mess. Then she put a pink pacifier in Asriel's mouth so he would be forced to smell his own soiled diapers.

He started to wet diaper due to the coffee.

Muffet laughed and poked the front, squishing it.

He started to cry from embarrassment.

"Awww, just like a baby. That's right, that's your new life from now on. You're going to be my baby. You'll be wearing cute dresses and filling diapers and there's nothing you can do about it"

He got angry and summoned a chaos saber and tried to attack muffet