For one of the first times in their entire marriage, Hermione truly began to believe that Antonin had only concerns for her well-being. He wasn't trying to control her or keep her tethered to him out of fear that she would run off again or seek to overpower him. One look in his worried and fearful eyes put those thoughts out of her mind. Clearly she wasn't thinking correctly. Likely hadn't been for years. It would make sense that she had nothing to be afraid of when it came to Antonin. Hadn't he tried to prove for years how much he loved her?