Secret Husband by Normandie Alleman

Psyche’s new husband only appears to her at night, and she’s not allowed to see him.
At first she finds this strange, but before long she falls so deeply in love with him, she forgets all about the unusual conditions of her arranged marriage.
But once she hears the rumor that her husband is actually a monster, she becomes obsessed with discovering the truth. Determined not to be deceived, she finally unmasks the man she loves, and risks destroying the one relationship that has brought her happiness.

Secret Husband is a re-telling of the love story between Cupid and Psyche. It was inspired by the original tale from mythology, spiced up a bit.