The romantic liasons where kind of weird in this story but what was creepy was that Batman apart from being with his initial wife and Wonder Woman, he also got it on with his son's (BJ's) adopted son's (Clark Wayne's) daughter (Lara WAYNE) And had a kid with her... I mean sure they weren't related but it's still wrong.
The only relationship I really liked was BJ and Kara, and you could tell he never stopped loving her and even when he died she came back for him.