Why Was He So Convinced?

Christian hated when Avery was upset. She came back tired from her visit with Angelo and after speaking of it briefly, she completely changed the subject and dove headfirst into wedding planning mode. She clearly didn't want to talk about it. 

What was his deal, anyway? Why was he so against her getting married? 

Previously, he had said that the two of them were cool as long as Christian didn't distract her from her goals. He had no intention of doing that so why was the man acting like this? 

He didn't understand it and was afraid to keep pressing Avery. She seemed like she might crumble away despite putting on a brave front when they went to the cemetery. Her eyes were sad but she acted like this was a perfectly normal way to meet. 

"Dad, this is my fiancé Christian. Christian, this is my dad," she introduced as she gestured to the grave.