It seems to me your wife was "buying time" in hoping that using her dad to get you into the union will eventually lead to you realizing, as she hoped, that the whole trans thing was just a phase. Just as you, she would love to see her life stay as it is, you stay as you are. You two both in your home, with happy smiling kids. Big family gatherings. Life is good. Not exactly what she can picture as the spouse of an MTF.
You need to ask yourself "Which Pain is Worse?" as does your wife.
My wife and I found ways to balance the conflicting needs and wants each of us have, as well the needs and wants of "The Us". She has seen how much personal growth I achieved by taking on the Trans-Beast for real. I am no longer that always angry, sometimes depressed, and more, person I was. I am far better of a person today then I was 8 years ago. She needed to compromise some too. TBH - HRT was not something she wanted for me, but she also saw that it would help me and us. Her "husband" having nicer boobs then her does not thrill her at all.
After a lot of our difficult, open and honest discussions, she knows how tenuous my life is and the difficult balancing act I have. So far the "Good" days far outnumber the "Bad" days for the GD. In a perfect I would go full-time in an instant. Today, it is a Want and not a Need. We both know if/when it is a Need, we'll have to sort out how to make it happen, and perhaps for us both.
There are no guarantees in life except death and taxes. Going full-time or even GCS, you still have the "Do-Over" option. Me? I like options, even if they can smoke my head