Reddit mentions of Head Over Heels: Wives Who Stay with Cross-Dressers and Transsexuals (Human Sexuality (Paperback))

One thing that my wife and I did that I think was particularly useful was to read this book together. Most of the book is about cross-dressing spouses, with some later chapters mention how relationships changed when one spouse transitioned.

What we would do is spend some time reading a few chapters, then talking them over. It was a useful exercise, as it helped to see that 1.) there are couples that have been through this and ended up okay 2.) there is a whole range of emotions that are brought up throughout, and having them articulated in written form and from many perspectives was a useful conversation starter ("This women thought 'this', is this a concern that you have? Why do you think that is? Is there anything we can do to help that?).