Chasing Sunsets has elements of near sci-fi in it.
The story includes cloning, where the MC has the option to try to clone Mallory's dog who died horribly when she was young.
It deals with the trauma created by a man - the person who raised Mallory - who was so consumed with the idea of Sarah that he fertilized and implanted one of her eggs, placing it in another woman - the person who gave birth to Mallory.
I don't believe that Sarah knew that her egg was implanted in the wife of James, creating the incest/not incest aspect of the story that is currently uncertain.
Then there are two children raised together (the MC and Jaye) and we get to choose their relationship path forward.
Is it romantic, is it supportive, or is it competitive with little love or trust remaining?
The incest aspect plays a part of the story whether or not the MC pursues Jaye or Mallory.
IMO, it plays only a side part in the story for those who reject both of the lead LIs and focus solely on the side women (and yes - I suspect that the % of those who take this option is small).
I'm enjoying the story being told, including the potential angst that Jaye is feeling about whether or not she and the MC share the DNA of the same mother.
I know this is not something enjoyed by all, but I am fine with it.
I'm looking forward to what happens now that they have returned to Boston, both story-wise and with the different relationships.
Cheers!!