Love Runs Deep by Gail Chianese

Active duty is no time for romance, but when two naval officers find themselves in truly close quarters on the USS California, the temptation to fraternize is hard to resist. Can two ambitious sailors follow orders long enough to see if love is on the horizon when they’re finally above water? Lieutenant Nic Riley is the only girl in a long-time Navy family, and she’s determined to prove she’s just as seaworthy as her brothers.

When she aces training for submarine duty, it calls for a celebration—and one incredibly hot guy is happy to party with her all night long. But when Nic boards the sub and finds herself face to face with her hunky fling, the idea of spending six months underwater takes on a whole new meaning… Having a girl in every port was Lieutenant Kyle Hutchinson’s style—until the explosive night he spent with Nic. Dating onboard is firmly off limits, but Kyle can’t get her off his mind much less out of his vicinity—until a junior seaman’s devastating stunt puts Nic’s career in danger.

Kyle won’t let her take the heat alone, even when it means risking his own reputation, but fighting for a future together will be a whole new battle…