Widow's Vengeance

Natasha Romonaoff and Hawkeye found themselves teleported into another world, only they were now babies. As they grew up they discovered their magic, they knew about magic before, 'how' you might ask. Simple, they had known thanks to Natasha's dead husband who had actually travelled to their world from his own, his name was Harry Potter. And guess what, he's alive and young now.