I feel like the husband had all the chances to prevent this from happening. Cheating on his wife and indirectly stifling her career? That's all in the past and something he could've atoned for, but it did set the bedrock for future events. The moment our MC told him that story, it was a que for him to get out and do something. The least he could do was wait for his wife instead of going to sleep. In his own words, it wasn't even a comfortable ride!