Hostage to Pleasure - Nalini Singh
This is the second time I'm reading the first few books and I have the same feelings as before about Dorian and his animal. The cats are still my favorites and after everything he went through with his sister and the clear path agains the Psy, I still loved his story and the way Ashaya made him more alive and one with his animal.
She's a different Psy because her life was never to Silenced as the other ones we came in contact so far in the series and she was always aware of the revolution and the dark ways the Council managed the dissidents. So for her to do everything to save those children really helped Dorian accept her. 
Loved this couple and the way things changed in this book. Psy are getting more restless and the Council is changing to harsher moves.