'Married at First Sight': Did Zach accuse Mindy of being dishonest for not telling him about her miscarriage?

Zach Justice and Mindy Shiben make for an extremely complicated couple and haven't been on the same page since day one. In this week's episode of 'Married at First Sight' - Anniversaries and Secrets - the two spent their one-month anniversary by accusing each other of keeping secrets.
Zach's behavior hasn't been top-notch. Ever since their honeymoon, he has been aloof and wanting to be in his space. Whereas, Mindy has expressed interest in investing in their marriage, experiencing the experiment fully and then taking a call on whether or not they should be together. This gap is only widening with time and probably is no longer fillable, not after what went down in the latest episode.
Mindy, like always, tried to understand why Zach drifted apart after their wedding day by asking questions. She asked if he had a girlfriend or was gay only to understand better if there was an aspect of Zach's life she was missing out on. But he took it in a different direction by not only giving twisted answers but at the same time accusing her of hiding things from him.
It's natural for anyone who has been clear about her intentions and in her communication to be baffled. Mindy made multiple efforts to understand what gave Zach the impression that she hid details from her life but Zach never came out with the whole truth. He kept repeating himself, said he would not go there and added that she needed to figure it out all by herself.
It's surprising Zach would accuse Mindy of being dishonest when he kept his chats and phone calls with her best friend, Lindsay, a secret. He was uncomfortable when she threw a string of questions at him trying to better understand what kind of equation he and Lindsay share. However, he did defend it all by saying it was when they (Zach and Mindy) were having a tough time being in the marriage and he had taken his wedding ring off.
He said he was seeking help from her and since Lindsay is a close friend she'd know a lot about Mindy and what she has been through her life. So, this secret that Mindy is hiding, is it possible that Lindsay gave it away to Zach? At the beginning of the show, Mindy shared her sister died of a drug overdose and soon after, she suffered a miscarriage. Interestingly, Zach and Mindy never had a conversation about it or was it not taped? There are chances Zach could be withdrawn because she never discussed her past with him.
Trust and honesty make for a solid foundation for a successful marriage. In this case, it appears to be a lost cause. If Zach and Mindy intend to make this work, both have to keep their communication channels open and start to be more vulnerable around each other. Every time they are in the frame, it seems as though they force themselves to have a conversation and obviously, have their guards up. It's hard to watch them navigate this whole situation they've gotten themselves into.
Catch all the new episodes of 'Married at First Sight' on Lifetime every Wednesday.