I'm instantly in sans arms, can he not see the darkness?
"Frisk, what have you done?!" He's sobbing, tears cascading down his cheeks.
"I had to," I say painfully.
"No, no we could have done something else! There has to be another way!"
"The darkness moves from person to person, it won't ever stop," I pull out my talisman. "You need to help Grillby, he's in so much silent pain, that's what the darkness feeds off of."
"Frisk what are you saying I don't understand?" I put my hand gently on his cheek, wiping his tears. Pain shoots through my skull, the darkness is fighting back. I pull sans down and put my mouth to his, my last kiss. He closes his eyes and wraps his arms around me. He doesn't want to let go and neither do I, but this has to happen. I push off of him and roll out of his arms, I roll until I hit the end of the waterfall. Sans approaches me.
"Frisk, I can't let you go! I won't let you!"
"I don't want to sans I really don't, but you have to help the others, it's the only way," I say. Holding out my talisman.
"Frisk don't," his magic holds my soul, tightening my vocal cords. I look at him, he finally understands what's happening. He's trying to stop it, if the darkness takes over then the first thing it's going to do is go after him, I won't let that happen. He is only a step away from me when I make my choice, it's me or him. One of us is going to die because of the darkness. He reaches for me when I role to the side, and off the ledge.