Catelyn persuades Ned to take their children’s future more seriously and find them good matches.
“A marriage is an alliance, Ned. Do you think I married you out of love? I did it for duty. Love came later.”
“And you don’t want that for your girls? For love to come sooner or later?” Ned asked gently.
“Of course I do, but Ned, that is not what marriage is about. It’s about strengthening your house by forging an alliance with another house. There is so much bad blood between the Starks and the Lannisters. If Sansa married the Imp it could change that.”
You can read the whole chapter on An Archive of Our Own.