^ I presumed that Tain was never married, since we never saw or heard of any wife or children, and that Tain was a
'He that hath wife and children hath given hostages to fortune' kind of guy... though I may be wrong. But at least Andrew Robinson seems to have gotten the same impression (as seen in
A Stitch in Time).
I don't think that cheating is widely accepted on Cardassia, judging by Garak's scolding of Dukat in "Civil Defense": "You, a
married man!" Soldiers away from home with their 'comfort women' might be be an aberration from the usual behavior on Cardassia. Damar was a screwed-up alcoholic whose marriage was less than happy, judging by some of his lines.
It's impossible to make any kind of generalizations about Cardassian attitudes to infidelity based only on that, no more than we could derive the conclusion that cheating on one's wife is a perfectly accepted practice in contemporary Western society, based on a bunch of politicians and other celebrities known to have been unfaithful to their wives.
There are plenty of marriages like Dukat's in real life, especially between people from powerful and rich backgrounds. Look at the Kennedys: Joseph Kennedy and his sons were all infamous womanizers but their wives never tried to divorce them. Joseph Kennedy and Rose Fitzgerald had
9 children and their marriage lasted despite his infidelities including a well-known affair with Gloria Swanson. And while JFK had just 2 kids with Jackie, Bobby Kennedy had
11 children with his wife Ethel, while managing to have a bunch of mistresses (just like his brother Jack) at the same time.
As to what kind of relationship Dukat had with his wife, that's also impossible to guess from the little information we have. People don't exactly have to be madly in love with each other, or even incredibly attracted to each other, in order to have regular sex in a marriage, which, without birth control this often results in a bunch of children. Or they may not even have regular sex, but they want to have a bunch of children and are actively trying to conceive them. In any case, plenty of arranged marriages between royalty and aristocracy throughout history, including those where partners are known not to have particularly cared for each other, prove that you don't need love or passion to conceive several children over the years. And bear in mind that having lots of children may very well be a matter of status on Cardassia - she may want to have as many children as possible because it shows her worth as a Cardassian mother. As to whether it is a case of
"Dukat being a horndog and his wife submitting passively/dutifully to her "duty" to please her husband, and also produce children. Or they might have had genuine passion for each other." - I'm not sure why it has to be either/or. It's also conceivable that she liked having sex with him and was OK with him being around but wasn't exactly madly, deeply in love with him. Considering the fact that she left him only when he was disgraced, I suspect that their marriage had been more based on status and social standing than anything, for quite some time, at least. It may have been a political marriage between members of prominent families from the start, or they may have been really in love with each other once, but it had cooled down with time. Anything is possible. Dukat's jealousy over his former wife being courted by another gul doesn't have to mean he has any passion for her, as it was more about his pride and sense of possession, and most of all, his frustration over the loss of his powerful position in Cardassian society (i.e. the fact that this guy now dares court his ex-wife shows how much his position has changed - he never would have dared while Dukat was in power).