Ineffable (Crowley x female OC)

Crowley has a secret, something he can barely admit to himself: he is in love with Jenna Kingsley, an American woman who doesn't even know he exists. What happens when she befriends Aziraphale and he introduces her to his demonic best friend? Embarrassment, catatonia and profuse sweating (obviously), but also the chance for Crowley to form a real relationship with her, something he's fantasized about for three years. Additionally, he has the opportunity to learn more about her, as does Jenna herself, who didn't know she could heal wounds or sense lies until interacting with angels and demons. Can Aziraphale and Crowley protect her from Heaven and Hell's curiosity, judgement and wrath upon discovering who (or rather what) she is?
Set present-day, post-Apocalmost