Antonin's response to learning she was present the day of the bombing was to forbid her from leaving the village until the baby was born. She'd been set to argue with him until the stress of the day's events put her in St. Mungo's. Her Healer was the one to make the final decision that she remain on strict bedrest for the remainder of her pregnancy. At least he'd saved them the inevitable row. Hermione did as she was ordered.