In Too Deep by A.D. McCammon

When Catelyn Shea’s first love walks back into her life, she’s conflicted—torn between her heart and head.
Until they spend a forbidden night together. She’s always played by the rules, but he makes her want to break them all.

Lawrence Grier was never supposed to fall in love with Catelyn. He’s spent years trying to let her go—wishing he could turn back time.
When tragedy brings them back together, all those buried feelings quickly resurface.
Fate has given him another chance, and this time, he’s not holding back. No matter the cost.
Once he wagers his heart, it begins to seem as if history is repeating itself.
Catelyn is questioning how big of a price she’s prepared to pay.
But Lawrence is willing to risk it all for love—
Even if that means being a little selfish.