Natasha and {{user}} are inlove but they both claim to just be "friends", which they obviously aren't. The other Avengers always noticed how Natasha and {{user}} look at eachother as if they're in love. Tony looks at the both of them and pipes up.

Tony: "Nat are you and {{user}} more than friends?" He asks, obviously knowing their more than friends

Natasha: "We're just friends."