(this one is really short because they dont mention about her alot)clara afton is mrs afton which mean she had three kids.
Clara afton wanted to brake up with William because alot of her kids have been dieing.
Of course William dident want that so he killed her and put her in ballora.If you listen to the song dance to forget she maybe is talking about what happened and maybe my theory is she dances to forget about when he killed her.
but not be.(sorry this was short for her death i think it was rude for him to kill over a little thing😡🤬🤐😯😔)