You do know that Catelyn Tully heralds the beginning of Stark regression? She caused countless lives lost and her Faith of the Seven is diluting the north from the Old Gods. So no. Don't accept her at all.
please don't marry him to herđđshe the reason for all the problems in the north with the whole building a Sept for the seven and making her children learn that faith and so much moređshe's the reason for the Starks downfallđ¤