Librarian Marcela Ortiz has been secretly in love with her best friend for years--and when he gets engaged, she knows it's long past time to move on. But before she gets the chance, she has a bigger problem to contend with in the form of Theo Young, ex-NFL player and older brother of the man she's in love with. When she discovers Theo's plans to confess his feelings for his brother's fiancée at their engagement party, Marcela is quick to stop him--despite how tempting it is to let him run away with the bride-to-be. She manages to convince Theo to sleep off his drunken almost-mistake at her place and when they arrive at a family brunch the next day together, everyone wrongly assumes they hooked up.

Since Theo needs a cover for his feelings for the bride and Marcela needs a distraction from her unrequited feelings for the groom, they decide to roll with the lie. Until one late night at a bar, they take it a step further and discover a layer of attraction neither realized existed. Soon, they find themselves exploring the simmering chemistry between them, whether in library aisles or Marcela's bed. There are no boundaries for the rebound relationship they form--just a host of complicated feelings, messy familial dynamics, and uncovered secrets that threaten to tear them apart before they can even admit to themselves that their rebound is working. Maybe a little too well.