Total War: ROME II - Emperor Edition

Total War: ROME II - Emperor Edition

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is there a mod that can make the son/daughter of the faction leader marry another man/woman from another country?
so i recently just started playing rome II again, and this is the question i have since im playing this game with the DEI mod.
In Alexandros's campaign family tree, his sister can marry another man from another nation, i mean, as far i as know there is no way to marry someone who is not the faction leader for marrying another man/woman from another nation.
im already tried searching from every possible source for a mod that could marry someone who is not a faction leader to another nation, but no result.
and i want to try to code but i have no clue where to start it.
so just like the title said, is there a mod that can make the son/daughter of the faction leader marry another man/woman from another country?