The Widow's son

Natasha Romanoff is gone. And forever. Well, that's what everyone is telling Arthur, her young son she left alone when she sacrified herself to get an infinity stone to defeat Thanos. The young boy now lives with Wanda Maximoff, who lost her love and understand better than everyone that deep and terrible feeling. But for Arthur, the russian spy has not desapeared. He won't give up searching his mother and everyway in he could succeed is good to think of whatever it takes...