While he and Marinette became closer, his parent's had been drifting apart bit by bit. It wasn't something he really thought about in the beginning, his father had always been distant and cold, but it still shocked him when they told him they were getting a divorce. If he had thought it was tense before then boy oh boy were he in for a surprise. He could tell she knew something was wrong, but he brushed it off as it nothing was amiss. He had really hoped nothing would change for them. (I based this story of Lesslinette's fanart. So check out her tumblr).