Then you remember the day you came home unexpectedly and found her in the shower with another woman!
It explained a lot that she was a bisexual... But no, that's sugar coating it. No, it turned out she was actually a lesbian. You had still wanted her to stay, but she moved out and on to her new lifestyle.
And then she took some perverse joy in making the divorce settlement very much in her favor. And you were such a sap, you still wanted to make her happy, so you gave in and let her screw you over in the settlement.
Your musings are interrupted by Shay calling out to you from upstairs:
"Inspector, can you come upstairs?"