FIC: On Her Lips My Kiss (Harlequin Big Bang)

Title: On My Lips Her Kiss
Fandom: Marvel Cinematic Universe
Pairings(s): Steve Rogers/Natasha Romanov
Rating: Explicit
Word count: (for fics) 8713
Summary: Steve falls in love with her when he meets her, but she is someone else's, isn't she?
Notes: Thanks to Larry for betaing this one for me.