Sorry to hear your wife got sick. There are many over the counter products like Bonine, Ginger, Green Apples, etc. that can help. If she was still a little queezy with the patches, either a green apple or a few drops of bitters in Sprite or 7Up or a GingerAle will calm that.
Normally, the seas are not that rough. Thankfully, I do not get motion sickness. In fact, it's like rocking me to sleep when we're in rough seas. We just returned from the Epic and she was one of the smoothest riding ships I've been on. Of course, we had really good weather