There is not enough evidence in the story to suggest that Armand would drive his wife to suicide knowingly, but there is enough evidence to suggest that he was quite careless about what she and her child would do, even if it would involve death. What this means is that he cared so little about them that whether they were dead or alive, as long as they were out of his life, he was agreeable.
However, it would be too easy to declare that he would be ignorant of how much pain he would cause, and how much he was taking away from her. This being said, Armand's selfishness would stop at nothing, and he did intend to inflict pain due to his inner anger. Yet, its not too arguable that he wanted her to kill herself.