If she has her mother announced as dead then no one can claim that the woman is her mother to the public and try to use that relationship to their advantage, so it makes sense.
Personally, I would have sent out assassin's after her mother if I was in her place. (Having shitty abusive mother who abandoned you to your father is something Estelle and I have in common)
I am aware. Lol. Just thought it was a bold move knowing how fluffy our dear MC is. (▰˘◡˘▰)
True lol
Estelle: You don’t have to go that far. Kelson, you really have a Castiello way of thinking.
Also Estelle: *announce to people her mother is dead when she’s not* ε=ε=(ノ≧∇≦)ノ