Were Hazel and Colin so familiar with each other?

Did Hazel know his relations with Colin?

“Brother...” Gabriel opened his mouth and stopped talking! How could he say that? Hazel was a good girl? He didn’t want to get Hazel involved in this cruel struggle?

Or he loved Hazel so much! Since in the university, he had never forgotten her?!

“Will she have to be involved? I heard that she is just a wild girl from the countryside! She has a bad reputation!” Gabriel said in a calm voice.

Colin looked at Gabriel and said.

“Gabriel, she is the daughter of the mayor. She is useful to me. And...” Colin...