Update!!
Just wanted to give an update since last checking in. We decided to sit down with a financial planner to go over things. She was an hourly based CFP and CPA. I was pretty confident in things, but I figured this would help my DW become comfortable with the idea of easing into retirement by going part time.
Well, we had our meeting and DW now feels comfortable going part time. Plan is to reduce 403b contributions to minimum for company matches to offset some of the lost income. It was good to get a second opinion, and gave me some confidence that I have been doing things right. Picked up a few pointers, and gained some insight into our pensions and SS. Like all things in retirement, our plan is flexible. Our plan is to give this a go for about 5 years to ease into retirement. Advisor saw no holes in that plan.
Now we just have to hope her employer allows her to reduce her hours. She has a meeting with her boss next week.