Re: Jessica D/Natasha R
I can do a rough idea. Natasha was KGB, brainwashed and trained to be a spy from a young age. The Winter Soldier helped train her, they were both in a similar position. Apparently there was some hanky panky in there. She infiltrated Stark Industries and planned on killing him, but it didn't work out. She teamed up with Hawkeye, they were both criminals at the time, but they both eventually converted over. She joined SHIELD and the Avengers after shaking the brainwashing off.