It’s not ‘insane’ at all. It’s less than 20 years. They are two grown adults, both young, both very attractive, and they have an immediate connection. It couldn’t be any more ‘sane’.
fyi, in the original book, the guy is 20, and Izzy is 12. Not sure why they felt the need to deviate from it, maybe that age gap was too much for the society to accept!?
I dont see any problem in a gap age I think Hayes felt in deep love Solene and she isnt prepared for this event because she was angry with her daugther 's father