CV, no one can predict the future... but I see a possible future for you that you would probably say would never happen in a million years...
As many as 6 years ago... I was the WAS... I was wondering why I was with my W. She did everything she wanted to do and kept hounding me for more and more and my needs were never met and I just gave up.
I spent time with the family (my obligations as a H) but I was just as happy doing things by myself and for myself than with my W.
But I stayed in the M. And I am very sure that by this time I probably would have had an exit strategy. I had already had some thoughts about it, although I was staying with my W because I believed in my vows. I had given in to living a life where I was sure that I would never have a wife who would be the wife I had hoped.
And my W... IDK... all I know is... she beat me to the punch.
All I can suggest is... if you plan on staying with your H until your S graduates...
Well, we're talking about 7 or so years... a lot can happen in that time...
Based on how I see things as you have written them... you may find yourself the LBS in a few years...
If I knew THEN what I know now... Things might have been different... but... I don't know that, either... but I can say things would at least have been different, for me...