I did do the Kaija Love path or whatever it is called. She does question her loyalty but she is still loyal to the Templars first. She has made no decision to break trust with the Templars on that path, she just has doubts. After what she has done, being lovey dovey is the least she can do.
Its the same with cheaters, they will be lovey dovey after they cheat to appease their guilt while telling themselves they are "making it up" to their partner, even more so after they are caught. How can you trust them again? Even though I have played the love path I still have no trust in her character, but I thought it was only fair to play that path and get a more balanced view of her character.
Some disagree and that's okay. I admit it, I'm a hard ass once trust is broken, earning it back is a very difficult task. From my point of view, how will the MC ever trust her or his parents again? How long before they keep more secrets for "his own good". We don't even know if there is more secrets to come.