Kazuya is still in untrustworthy position, so just let her cry on his shoulder (or chest) and enjoy the moment of trust building. He need more trust from her to make a bold body contact with her.
The feudalism politics are so realistic in this one... if you learn history, you'll notice friendly King/Queen only exist in fairy tail..
Faction leaders (the fuedal lords), especially if they're strong and ambitious, will always try to get what they can get for their/their kingdom's best...