Infinity War - Romanogers Fanfic
This fanfic takes place shortly after the end of the Civil War of the MCU. Natasha realizes that she has more feelings for Steve than just friendship, but she realizes it a little too late, Steve and Sharon have already started a relationship.
One night, Natasha ends up not resisting and invests in Steve, the two kiss and have a torrid love night, but the next day Natasha realizes that it was a mistake and decides to disappear to not to interrupt Steve's happiness.
*First of all, english is not my first language, so I already have to apologize abou my writing here and I have to say that this has nothing to do with the Infinity War from the comics, since I never read that.*