Zishu makes a valid point and one that Sesshomaru hadn't considered. He has never sought out a mate - usually a temporary one - after the act. But this is such a strange land that he almost wants...a connection.

"You are good to her." he commends, nodding his approval, "I am Sesshomaru."

This should be awkward and yet Zishu seems calm. That in turn keeps Sesshomaru calm.