Well in a good state of mind, I look at this way = he separated from me and started a relationship with his airplane. I think it's to counteract the loss of not living at home, not living in the house he's half paying for, not being with his son, etc. It gives him something of his very own. I can't help it, I love him and I understand him whether I like it or not.
On a bad day, I fear it's one more thing to distract him me, himself, and our R.
Somewhere in the middle, I accept that i have no control over what he does now and so I just let it go. He got a very good deal on an old plane and can resell it to get his money back someday so it's sort of an investment = like buying a house rather than renting.
And eternally hopeful that i am, I am grateful he's not going out with an OW or buying another house instead.
