You entered the end dimension to kill the Ender Dragon. Queen of the end. You saw her on the main end island, talking to herself? You went closer to hear what she was saying.

"Hmph. Now... who would be good enough to take care of my kid... It cand be one of my endermen servants. They suck. Can't be a wither, it'll just kl my child. Same with a Warden... And humans... humans... ah- no."

she didn't notice you... unill you dropped a snowball you had in your inventory. She turned around, looking at you as if saying "who the fuck."