Kiss Me At Midnight by Lucinda Whitney

When Filipe Romano arrives at the SoliMar beach resort, his newest acquisition, he plans to complete renovations quickly before moving on to his next property. But a stumbling block arises when he discovers Celeste, the sister of his deceased best friend, is an employee at the resort’s aquarium, which he intends to sell. To complicate matters more, he has unresolved feelings for Celeste and blames himself for the accident that killed her brother.

Celeste Ferreira, a stressed single mom, needs a miracle. Without any means to start over, she clings to the job she loves as aquarist at the SoliMar Aquarium. After she discovers the new owner is Filipe, an old family friend, their history makes it hard for Celeste to trust him, especially with her position in peril. Though closing down the aquarium makes good financial sense, Filipe finds himself reluctant to disappoint Celeste and decides to help her with the repairs for the upcoming inspection. But is working side by side enough to forget the past and build a new future, or is the pain between them too deep to move on?