Yes to all that. It is even Pagan, as time travel is accomplished by going Through the Stones — best done at the time of Samhain. I have on my refrigerator a magnet which says “Not only was I a bigamist and an adulteress, I had enjoyed it.” Claire Frazier on her wedding night to Jamie, the Love of her life.
Having traveled backward in time to the 1700s, Claire fell in love with and married Jamie while still wed (in some sense) to Frank, a man who would not be born for 200 years. Yet she chose to wear Frank’s ring as well as Jamie’s even after Frank’s death in her own time. Another character in that Past time marries two men who are twin brothers.
When I asked the writer, at a presentation, whether she was polyamorous, as I offered her a Live The Dream newsletter (to my daughter’s embarrassment, as she knew the author from handling autograph tables for many years at SF cons), Diana said, “Haven’t you read my books?” and laughingly took the newsletter. She wrote those books to explore what kind of love lasts for fifty years, with Jamie and Clare as the example of long-lasting erotic joy well into grandparenthood, deep caring that endures through deep emotional trauma, and commitment that defies space and time.
I love the books and the TV series. Speaking on this topic is my birthday gift to myself: June 15 is my 71st birthday. Cake and ice cream for me—let us know if you have a June birthday to celebrate along with mine—we will add your name to the cake.