Forbidden Moon (The Moon Trilogy #3)
Jane Bonander

San Francisco, 1886 . When Buck Randall met Molly Lindquist, he knew she was the only woman he would ever love. Only a girl when they met, the prideful Buck promised to wait for her until she is old enough to become his.
As an adult, Molly is looking for her ticket out of a life that she hates. Engaged to a powerful Texas rancher, she’s all but forgotten the pact she made as a child. But when Buck returns to her life, a romance is rekindled that burns too brightly to ignore, and a promise must be kept—at all costs . . .
“Jane Bonander reaches to her readers’ hearts.” — RT Book Reviews