Alexander had come to Mikaya with genuine goodwill in his heart.
He could empathize with the feeling of the girl who had been forced by her father to come to a place she never knew about, with a man she had never met and with no friends or family.
So he wanted to make her life here a bit more bearable.
But what Mikaya was doing, showing such blatant disrespect greatly irked him.
But still in the end Alexander managed to keep his cool, his logical brain overriding his emotional heart and telling him, 'You need Mikaya more than Mikaya needs you.'
This was very true as whatever Mikaya wrote in her monthly letter to Pasha Farzah would greatly affect his standing with his only ally.
And because he didn't want to fall out with this great power unless absolutely necessary, he could only suck it up and watch Mikaya climax herself in front of him.