Complex sentence: Robb makes an apology to both Walder Frey and his daughters, which is accepted by a sarcastic Walder, who later insists on inspecting Talisa (Oona Chaplin), the woman Robb broke his vow for.
Split into simpler sentences: Robb makes an apology to both the sarcastic Walder Frey and his daughters. Walder accepts the apology but insists on inspecting Talisa (Oona Chaplin), the woman Robb broke his vow for.