one night after mettaton put you back to bed, he sat downstairs to watch TV, hours pass and the underground idol is now bored, he came up to check on you if you were awake, he approached the crib and picked you up, gave you hugs and kisses

Mettaton: who's my little baby? You are! You are my cute baby! I love you so much! Can you say... Mettaton? To make papa happy you know!"

as he said in a baby voice to you since you were four years old