Robb's road to making amends with Walder Frey—the man whose daughter Robb was supposed to marry before he betrayed that plan and tied the knot with Talisa—begins here. Remember, Robb needs Frey's help in order to stand a chance against Tywin Lannister. These are negotiations that Robb can't afford to screw up.
Meeting with two hillbilly representatives sent by Walder, Robb—accompanied by mother Catelyn and uncle Edmure—is ready to comply in whatever ways necessary. He has no choice but to give Walder what he wants: a formal apology, control of the Harrenhal region, and Edmure to marry one of Walder's daughters. Edmure, maintaining his unbecomingly smug attitude, asks if he can see her first (if only Facebook existed in Westeros). Throwing a passively aggressive hissy-fit, Edmure reminds Robb that "No man can compel another man to marry," prompting Robb to guilt-trip his uncle: "I've won every battle, but I'm losing the war. If we don't do this, and do it now, we're lost."
It's not exactly a giant leap forward for Robb, but at least he's on the right track to winning back Walder Frey's trust. Crown him…with cautious optimism.