How does Kevin and Dana's relationship progress in the book Kindred, even though Dana keeps going back and forth in time?

Dana and Kevin have a complex relationship in 's . They are a
married couple living in California in 1976; however, suddenly, Dana is drawn into the past, to
a slave plantation in the antebellum era. Her experiences there change her and give her a new
perspective on her life in the present, including her marriage.

Kevin is a
supportive husband who listens to Dana's accounts and believes her, even though her stories
sound far-fetched. Of course, he sees her physically disappear when she is brought repeatedly to
the past. He helps her to strategize for each of her subsequent trips and listens to her
traumatic narratives when she returns. For most of the time, though, Kevin is not physically
with Dana in the past. He does eventually make a trip with her, but they are divided in their
experiences because of the number of their visits.

Even more importantly,
when in the past, they are treated vastly differently since Dana is a black woman and Kevin a
white man. Dana is...