Seeing him cry here broke my heart 
Dia calling him uncle and giving her mother's handkerchief her brother gifted 
In the next chapter
Dia calling him uncle and giving her mother's handkerchief her brother gifted In the next chapter
Spoiler!
Marine remembers the garden where she had gone with Peridot before, so she runs there. In the snow, she finds small footprints and realizes they belong to Peridot. This makes her feel a little relieved because there are no other footprints, so he seems to be alone. She follows the footprints and reaches an old tower. Marine finds a broken part in the fence around the tower and goes inside. The tower is dark and scary, but she carefully climbs up the stairs. At the top, she finds a small room and hears a rustling sound. She gently opens a wardrobe and finds Peridot hiding inside, curled up and scared. He refuses to come out or talk to her. Soon, Dia and the Duke arrive. Dia tries to comfort Peridot, but he doesn’t respond.
Then the Duke speaks, and suddenly Peridot runs out and starts hitting him while crying. For the first time, Peridot speaks and asks why the Duke came instead of his mother. He reveals that his mother had promised to come to him if he stayed quiet, so he believed that speaking would stop her from coming. Dia and Marine realize that Peridot stayed silent all this time because of that promise. The Duke apologizes and tells Peridot that his mother did keep her promise by protecting him in her own way. He tells Peridot to blame him instead. Peridot cries that he misses his mother, and the Duke hugs him, trying to comfort him. Dia and Marine watch this and quietly cry too 😭😭😭
I like to post spoilers for the stories I find interesting because I don't have much time to read novel due to busy schedule
you will find me in most romantic historical manhwa comment sections 
you will find me in most romantic historical manhwa comment sections 
