Jessi, you are your own worst critic on stuff like this. All thing being equal, yes it would have been great to have the back eye in focus as well. But I would also bet you an entire paycheck the parents are going to love that shot completely.
NB's are tough, and it is even tougher when the lighting is inconsistent. As others have mentioned, off camera flash would save the day in cases like this. If you don't have one, you did the best you could with a reflector. And as mentioned above, the folks on here are going to notice the technical issues and give you suggestions on how to resolve them. But the family is absolutely going to fawn all over your shots. I love them too. Sometime technical things get in the way of just getting a genuinely beautiful shot. In your case you have great shots with a few little things that you can do better on, but no one, but us camera nuts are even going to notice.