What if Red's S/O has a black belt in Judo and flips Edge when he gets too mean?
*…did that really just happen?
Red’s flabbergasted, staring at the scene while his mind struggles to comprehend what the hell just happened. One minute, his brother was belittling him, shouting about how he needed to stop being so lazy and threatening to shove the dirty sock (that’s been on the living room floor for stars knows how long) down his throat. And in the next moment….
You just flipped Papyrus.
He had known you were a badass. It was part of what drew him to you–the fact that you knew how to hold your own, that you could protect yourself in an Underground filled with angry monsters. But the creed down here was still kill or be killed, and you…
You just signed your death warrant.
Edge leaps to his feet, his face flushed scarlet with both indignant anger and his building magic, and Sans thrust a hand forward. You’re thrown against the couch, the wind knocked out of your chest (no matter what your training is, you can’t defend against the brothers’ gravity magic), which spared you from being impaled by a sharp bone.
“SANS, I SWEAR TO ASGORE–!”
Sans breaks into Edge’s rant by teleporting in front of you, his hand gripping the front of your shirt. You’ve never seen him look so terrifying; his sharp grin is tight and humorless, and his eyelights are mere pin-pricks, barely visible within their dark sockets.
“do ya have a death wish?” he snaps, shaking you once. "huh?!“
Red’s torn. On one hand, he doesn’t want you to get hurt, but on the other… he’s also pretty pissed that you flipped his brother. He’s held Papyrus in high regards despite his mistreatment, and even if you were trying to defend his honor, it was misguided. Sans didn’t need help with Papyrus. Especially not that kind.
“don’t ever do that again. capiche?”
Slowly, he releases you and turns to Papyrus, standing between you and his brother’s ire. "i’ll pick up an extra shift, ok, boss?“ He inquires tightly, while Papyrus looks between you and Sans.
”…FINE! TWO EXTRA SHIFTS, AND IF YOUR HUMAN STEPS OUT OF LINE AGAIN, NOT EVEN YOU WILL SAVE THEM,“ he grinds out, obviously still mortified that a human got the jump on him. After one last glare toward you, Papyrus stomps off to his room to work on his puzzle plans, while Sans sinks onto the couch beside you with a defeated sigh.
Awkwardly, he turns on the TV to fill the silence.