"What did she say", frisk asked, knowing that undyne could rescue them.

She said that it would take a few days to get us. so we should play a long.

"What do you mean? Do you wanna be her plaything" Frisk muttered.

Just in that moment Muffet came in, "Plaything yes. That sounds like fun. What isn't fun on the other hand is catching two naughty babies in the middle of their act of highest naughtiness. Hypnosis didn't work. Then I have to think of harsher punishment"

Muffet pinned frisk on the ground. Then she positioned Asriel on his stomach with his diaper in frisks Face so that his own face in frisks diaper. Then she began spinning a web cocoon around them.

No please don't do this.

Right before finishing he cocoon she took a vibrator and put it on Asriels diaper. It was a smart vibrator that would keep him on edge. She closed the cocoon. "Have fun, plaything", She added.

Frisk struggled, the stink of asriels diaper was really bad but she knew it would be as bad or even worse for him as she felt her bowels gurgle. She let out a fart.

Muffet giggled as she heard the fart and took the cocoon. She fixated it on the ceiling.

Ew this is so gross.

A day had passed and Frisk's diaper has filled up quite a lot. But so did Asriel. The smell and Asriel's moans combined almost made Frisk go crazy. But actually slowly began liking the smell as she was exposed to it for so long. She filled her diaper some more again.

Asriel started to love the smell of frisk's diaper. this is great frisk.

Frisk blushed hearing this.

Then Muffet came in and opened the cocoon. "Pheeew! Smells like a sewer in there!", She laughed and pulled Frisk and Asriel out, "And did you have fun?"

Yes it was fun. he moaned