Day 21: Double Penetration

Pairing: Fontfest (Gaster/Papyrus/Sans)

Tags for this chapter: Incest, Threesome, Double Penetration

"Are you sure you want to try this?" Gaster asks him, for about the hundred time and Papyrus hums, head thrown back as he easily rides his brother's cock, hips shaking despite himself.

Sans is laying back on the bed, hands clenched around Papyrus' hips but always happy to get the position with next to no effort. He trusts up occasionally to meet his brother's downward slide.

"It's f-fine, you can do it." Papyrus says eagerly, bending forward and exposing his drenching slit to their father, cock buried deep inside and how could Gaster possibly say no to such an offering?

He kneels on the sheets, one hand splayed against the bed while his other tentatively reaches out to brush against his son's slit.

Papyrus moans at the touch and it pushes Gaster to move forward, pressing the digit inside. It's tight, unbearably so and he can feel Sans as well.

He starts moving slowly at first, still scared to hurt either of them but Papyrus groans with every thrust and practically begs for more.

"Daddy, nggg- please just-"

Gaster nods without sound, not feeling like words could convey the view before him. He works another finger inside his son, stretching him patiently and by the time he's ready Papyrus is practically panting.

"You enjoying yourself there, bro?" Sans comments with a smirk, hands sliding up to cup is brother's face and pull him in for a kiss.

The position is ideal. Gaster lines up quickly, the head of his dick pressing against Sans' balls for a moment, pushing against Papyrus' outer lips until finally it starts sliding inside.

Papyrus keens, the noise swallowed by more kisses and it's so fucking tight, Gaster isn't sure how long he'll be able to keep it up.

Sans is sliding against him, a perfect juxtaposition for his own movements and it adds just a bit more friction, just a bit more pleasure.

He's practically seeing stars.

It takes a few more times to get the timing just right, but when they do it's marvelous, full to the brim and Papyrus is rutting helplessly, trapped between the other's bodies.

He comes suddenly, unexpectedly clamping down around both cocks inside him and Gaster didn't think it could get any tighter but somehow it does and he's coming too, grunting when he feels his son release as well.

It takes a few moments for them to ride out their orgasms, locked together for those painstaking seconds.

Once he can see straight again however, the royal scientist pulls out quickly. "Papyrus, Are you ok?"

He only gets a groan in response, but one that conveys 'I am fucked into oblivion so give me a moment' rather than 'you have ruined my summoned innards and I'm in pain' so Gaster relaxes, falling down on the bed besides his sons, Papyrus still on top of Sans, their contrasting sizes making it an odd sight.

A sight Gaster is rather fond of, though.

"I hope we didn't over-do it." Sans laughs, poking his brother in the side and Papyrus smacks his hand away, still deep in post-coital bliss.

"I'd say that's a yes." Gaster responds, pulling the sheets up to cover some of their indecency at least. Papyrus hums again, rolling over on his side between them.

"Very much so." He comments.

Gaster reels him in for a kiss, ignoring the sleepiness already tugging on his being.

He doesn't know what he has done to deserve his sons, but it was definitely well worth it.