Cristina,my point is...
I agree with Sicilian Babe that the destruction of the Family at the end of GF2 could be a reason, but I have to add another point.
Somehow Michael is like his father, with the old rules, the marriage is forever, even though he got married twice, but Apollonia died, and we could understand he got married again, but I think Apollonia doesn`t count for me, I do believe his real love is Kay, after he lost her, I think he doesn`t want another woman in his life, he was not like Freddo and Sonny, a woman who you haven`t known for enough time could be dangerous, she could be a trap. Plus Michael had some kind of hope to get Kay back to him, when they are having lunch together alone in Sicily they got a little closer but Calo knocked on the door to bring the bad news about Don Tommasino`s death, interrupting this scene!
What could have happened if this scene would have gone on?
And later, Mary`s death.
With this Michael`s hope is over.
In the Mark Winegardner`s GF Returns, Michael is hanging out with a movie star!!! Bullshit, Michael is not like Freddo!
My belief is if Michael didn`t get married again is because he still loves Kay, no matter Apollonia, Kay is the only Michael`s love forever.