Yukiyo Ichiya Monogatari - Episode 3

Once upon a time, a clan lord was betrothed to and fell in love with a princess. Her beauty made him speechless, and she always looked so happy. However, the lord's "affection" for princess Chiho became stronger every day, and she lives like a bird in a cage, constantly receiving the lord's hard love. Nevertheless, he is the nice lord whom Chiho knows. Because of his smile, all she can do is endure crying. But, one night, she would eventually...

What is the message in this story that Shizu was trying to get across the lord?