If the game is going to be as realistic as possible, why not implementing marriage too? The main idea of sharing "shared bank/storage accounts" is great, don't know about the parenting and children, it's more difficult to make that effective. Anyway, even if only the money/items thing gets done, that could have real repercussions on the game (real companies in marketing for example, and above all political marriage: the shinobi world is made up of clans, which better way to fortify one? Even to make alliances between hidden villages marriage could be fundamental).
Don't tell me about the male/female ratio, I don't think anyone here would ban a thing like gay marriage, if one wants to get married, he/she can.
Finally, marriage could be a real and complex mechanic of the game, it deserves the right to have a topic, in my opinion. Marriage is not a priority at the moment, that's obvious, there's an entire game to be made, but talking about future mechanics is not a crime.
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