how it all started

Natasha hated her
She hated Natasha

In Budapest, the russian spy got what she wanted. The other woman got hurt. They never want to meet again.
The woman lives with Bucky, but has no idea of his past. He has no idea of hers either.
But what happens when Bucky, who used to stay off the radar, starts wanting to get Steve's attention? Will he bring the poor woman along with him? And what will happen when she locks eyes with the person she swore to never see ever again?