For the sake of realism, not to be homophobic, but hear me out. They should have included a feature, where if two men and/or women married, then some of the other lords get offended at it, and launch an assault. It would be slightly realistic, -_o .
Unfortunately, it's still one spouse and two bros...
They should at least be realistic and let your leader have multiple wives. Or at least a couple of mistresses on the side.
The world at the time didn't really have that big of a problem with same sex relationships. It was just you generally didn't marry them. You married a woman and then kept a young male lover on the side. At least it was this way in Europe. Even a young Julius Caesar was captured somewhere in Asia I believe and supposedly was the male lover of some powerful person for a while. And while it was much much later, didn't Nobunaga Oda have Ranmaru Mori as his lover while married?
I presume this was much like how some male animals have sex with other males of the same species for entertainment (seriously, I think it's at least dolphins and some type of primate who do) and have sex with females of the species for baby making.
Realistically, this game should allow same sex lovers, allow mistresses on the side, and allow sibling marriage. Then again, I don't think Koei is trying to be too deep with this mechanic. They're just giving you a chance to create a CAW and then marry your favorite Dynasty Warriors girl (or man).
http://photobucket.com/SDClaims Babe of the Month - Sena K.: http://i.imgur.com/iLHDM.jpg http://i.imgur.com/4BSIW.jpg http://i.imgur.com/qsQ2O.png