Natasha stops by Steve's apartment for a friendly goodbye. Minor spoilers for Cap 2.

Steve and Natasha have a night of fun during a retreat to Tony Stark's beach house. They agreed it would just be a casual encounter, but neither of them could stick to that agreement for very long. When their affair is discovered, chaos erupts, lives are changed and the team is forced to deal with the fallout that results from their attraction to each other.