does the game invalidate royal marriages in certain situations?

[DarkMjolnir]

For example, if you have an alliance/royal marriage, and suddenly, said ally decides they want to rival you, does the royal marriage get removed as well?

I haven't actually seen this happen directly, except in another case: I was a tributary of Ming with a royal marriage. I then broke away from tributary status, and, even though my ruler was still married to the chinese noblewoman, the royal marriage status was removed, that is, the option in the diplomacy viewer said "royal marriage" instead of "break royal ties"

[Stormfox]

Usually, when relations sour (like when you are suddenly rivals or no longer a subject), the AI country in question cancels the marriage.

Which is great, because if you wanted to do that, you would have to wait for the respective ruler to die (the country which initiated that is the important one) or take a -1 stability hit.

[tonypa]

I don't think there is auto-breaking royal marriages but AI may choose the "break royal marriage" option if their opinion goes into negative. Like with many things in the game, some randomness is invloved.

[DarkMjolnir]

I'm kinda surprised the AI does that and wondering if they get the same negative hits the player would for that.

[tonypa]

Originally posted by DarkMjolnir:

I'm kinda surprised the AI does that and wondering if they get the same negative hits the player would for that.

Yes they get same negative effects. The logic, I guess, is that they are preparing for the upcoming war, and having royal marriage while declaring a war has also penalties.

Or, if you want, it could be that you have pissed off the ruler, and mad rulers can do whatever they want, it does not have to be all beneficial tot he country.

[Pozz]

Do keep in mind if rivaling is involved they nation rivaling the other will get the same removal of stability effect you get through diplomacy idea group.

That is, if you rival a nation you have a royal marriage with, you can break the marriage at the cost of 1prestige and -75relations