To me, it sounds as if she feels her trust in you to manage the finances has been betrayed. When you made investment, etc., was it a decision made by the two of you, or did she not wish to even know what you were doing with the money?
This could be a legitimate reason for her leaving, or it could be the smoke screen covering her truer reason. At this point, it's just guess work. Has there ever been an issue over investments in the past? Did you lead her to believe everything was fine and on target for purchasing a home?
As far as how to greet her at the airport, I would suggest you not buy her or her mother any gifts. Be pleasant, friendly, and smile. Do not initiate any hugs, or kisses. Let her lead the affection in the greeting. She may give a half-hearted hug (side by side, or a distance between bodies type of hug). Don't show that it bothers you. She has separated from the MR, so don't go with expectations.
A lot of your actions toward personal changes seem motivated by wanting to impress your W. Try to work on yourself for yourself, and not build expectations of how she'll respond to it.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!
