You lay on the air, floating bored as you see Frisk beat Sans for the 1,001st time. You bring out your ghost chocolate and start eating, knowing that Frisk will either barely get hit or no hit the entire thing
Frisk(In-head): "Must... make... him... happy..."
You: "There she goes again... She already made me happy in the last route..."
You just wanted to make her do 1,000 genocides and let her do her usual Pacifists, but now she continues, because she wants to see the same smile on you that she saw in the 1,000th genocide
After Asgore, she didn't [RESET], she took his SOUL and crossed the barrier, ready to make a massacare just for your joy, not only in the Underground, but on the surface
You: "Hey! Hey! Why aren't you reseting?!"
Frisk: "I want your smile..."
You: "H- Huh...?"
Frisk: "I want your smile to show again."
Jumps off the cliff and swings on a branch, landing on the ground