Who Knew? {Ace x Reader}

So this is an Ace x Reader oneshot I guess. I had wanted to do an Ace one for so long now but just couldn't figure out where to start until it hit me today and it's apparent my more morbid side is showing today so I apologize in advance. Inspired from the song Who Knew by Pink.
I don't own One Piece or the cover picture I've used for this story, or the song.
And without no further babble here, I hope you enjoy. Also, this story may be triggering to some people so please, be cautious if you read this.