Kitty and Caleb

What If before Tommy and Billy was born, Wanda and Vision had Two other twins? What If the twins died under infinity war? What If instead of two boys or two girls, it was one boy and one girl. This is the story of Kitty and Luca Maximoff.
(Kitty and Luca is 13 years old and in infinity war, they have a lot of powers But in Wanda Vision They only have one each. Kitty can teleport and Luca has telikinisi)