She shouldn't, she really shouldn't, but she catches herself smiling at his antics, agreeing with his foolish ideas and laughing at his jokes. She catches him watching her occasionally, whenever he's not blowing stuff up or annoying Coulson into tazing him (which surprisingly still hasn't happened).
Maria knows falling for Stark is a stupid idea; she knows he's unstable, knows how he is with women, but she really can't help it.
She's coming off her shift on the Hellicarrier flight deck, ready to fall asleep for at least eight hours, when Stark calls her over, asking – surprisingly politely – for a word.
"Agent Hill." He says smoothly.
"Mr. Stark," She greets him, and is caught off guard by his kiss.