Book!Robb: Mother, you're the only person I can turn to. I'm hiding behind a mask because everybody expects me to be the King, but I can't do it. I need your help.
Show!Robb: Ugh moooooom go away you're so embarassing you're ruining EVERYTHING
Book!Robb: Jeyne, we must marry because I took your virginity and since Westeros culture expects highborn girls to be virgins upon their weddings, you would probably have difficulty finding a high lord to marry. Also I might have gotten you pregnant and I know from growing up with Jon that it's really hard being a bastard, so I don't want to be responsible for bringing one into the world. This is a really hard decision, and I know the Freys won't take it well, but I've made a mistake and I'm doing everything I can to make it right.