Frisk and Sans were chillin on the couch.

Papyrus yells from the kitchen, "HUMAN AND DEAR BROTHER, I'M OFF ON MY DATE WITH METTATON!!!"

"ok" Sans says back. After Sans hears the door shut, he jumps on frisk.

Sans rips off Frisk's shirt and plays with her flat chest. He then yanks her pants off and shoves his fist up her crotch. She moans loudly, making Sans' left eye turn blue.

He then shoves his dick in there with his fist.

Frisk is crying and bleeding, but she is loving it.

Sans thrusts his fist and dick all the way up there, triggering Frisk's orgasm.

Frisk grabs a dildo from under the couch cushion and shoves it up Sans' ass. Sans yells "WHAT THE FUCK?" before moaning and cumming inside Frisk. Frisk bites Sans shoulder and he cums again, along with Frisk.

Sans takes everything out of Frisk and puts his face on her flat chest.

Frisk takes that dildo out of Sans and shoves it into her ass, then thrusting it even farther up there. She orgasms again and takes it out and puts it in Sans' mouth. Frisk then walks away as Sans just sits there, deep throating the toy.

Papyrus walks in along with Author-chan.

Author-chan yells "WHAT THE FUCK IS THIS SNAS???"