Love at 20,000 Leagues by Lizzy Gayle

Paradise Atlantis: The underwater, high tech vacation destination where utopia awaits.

Not for Sam. Not only is she deathly afraid of being submerged under millions of tons of ocean water, she’s stuck for an entire month with the people she blames for her family falling apart. Even with the unexpected attention of two sexy men, including her longtime celebrity infatuation, Sam is sure the trip will be a nightmare.
She’s both right and wrong. A type of pressure sickness she was unprepared for hits Sam hard, causing both lowered inhibitions and blackouts. When she gives in to her desires, a passionate romance blossoms.
Unfortunately, even this steamy new relationship can’t salvage the trip when a saboteur uses the AI to commit murder – murder timed perfectly with Sam’s mysterious blackouts. Now Sam must clear her conscience by finding the truth. But is she prepared for what she’ll find? Because either she’s a killer or she’s setting herself up to be next on the growing list of victims.