Wanda and Bucky were close kinda liked eachother. What they never knew was that after they escaped HYDRA made a child with their DNA. So when a new HYDRA weapon was introduced to the avengers they didn’t know it at all. Each mission the avengers were too late to get the asset. Until one mission they were prepared. They came quicker and better, they surrounded the asset. But some of them thought the person looked familiar to them. The hair…the powers. The thing was Bucky and Wanda weren’t even on the mission they were on a different one somewhere else.