It sounds like the three of you have a great base to start from. Things may not have going perfectly in the past, but now you three are communicating about this and are aware of each other's feelings. That is great!
Remember to continue with "very open" communication. Hopefully his wife will do the same. It is realistic for her to have some fears. All three of you should express your feelings. Maybe it would be easier if you or him started opening up about each of your own feelings first to help open the door and create trust. If you make yourself vulnerable, the others communicating will likely feel more comfortable to do so also.