He doesn't like her, he's just
bleep struck and I bet even that has worn thin too. The mechanics of going off piste to produce a little prince and princess was probably the death knell to the roast chicken treats of the early days.
But he's stubborn, as spoiled brats are. As kids they know if they keep on about a thing long enough the parents will cave in and it feeds a serious stubbornness they develop in later life. He will not want to admit he made a mistake.
I found it very telling when Orca asked him what gives him pleasure in his life these days. His long pause and genuine "What the
duck do I say here!" expression before coming up with "Walking on the beach and riding a bike with dolly on the back" was surprising. All that hand holding and staring and touching and roast chicken ... and she never got a mention. He gave up everything to placate her and now I really do think he doesn't like her much. But he will pretend. Badly. Because he has no control over his face, never did have. We see his moods in his face and it's creepy that he's not learned to control that leaking like a faulty tap. I bet it infuriates smeggy.