My wife and I have run the maximization software. I will be 66 on July 16, 2018. My wife will be 64 on May 1, 2018. The software indicates that she should file for her own benefit in July, 2018, and that I should file for a spousal benefit that same month (July, 2018). Should my wife file before I file? If so, how far in advance of my filing should she file?