Hardin was in his hotel room when he requested Iris to send photos of her. It took a long time before she called. She cursed at him and blamed him for it. He only grinned and when she mentioned that she accidentally sent it to Kenzo, he laughed. But anyway, seeing her masturbate with only showing her lower part and a few glances from her perky breasts made him tired.
He was tired because his hands can't keep up with his horny thoughts about her. He hates long-distance relationships but attending a lot of family business was his responsibility. And although Harriet, his baby sister, had her own business, he still had to provide for her. That's their tradition since she's a lady of the family.