In the US marital rape was exempt from rape laws until the 1970s, and state exceptions didn't end until 1993.Also, 1 Corinthians 7:3-5.As uncomfortable as it is, Westeros isn't far from reality in this regard.The only thing unrealistic about it, is that Sansa isn't being blamed for her own rape.
It's not that he was killed, it's that he went out like a little bitch. This was Ser Barristan the Bold, not Ser Barristan the HELP MEEEEE GREY WORRMMMMMMHe got built up as the best swordsman in Westeros since the show started, and this is how he ended? Come on now. Seriously.edit: And since when was Lady Cat a fan favorite? LOL