How the rest of the team found out what happened in Budapest.

Clint and Natasha have always had an obvious relationship but never wanted to explore what could happen if Natasha could let her walls down and let Clint in. Clint has always loved Nat and read what he will do about his feelings for her, will some one get in the way? Will Natasha not let him in? Will it be to late? (post AOU)