Knowing that Antonin wasn't interested in becoming the Dark Lord lifted some of the burden off of her shoulders. She had been terrified for him. There may not have been the all-consuming romantic love between them that stories and films were full of, but there was enormous respect. Especially now that she knew that he wasn't the abusive monster her addled brain made him out to be, she wanted him to be safe and happy and whole. They shared a connection, a son. It wasn't unreasonable that she wanted him to be protected. If he no longer wished to ascend to the throne of the Dark Lord, there might even be a future worth having with him... for him. She still didn't expect to make it out unharmed and whole herself.