both...one, 2 times a week is plenty for some folks, his bad for marrying someone with a lower sex drive. then, does he do things to turn her on? does he know what truly pleasures her? she should want him, not just be obliged to fukk him because he wants sex. her, sometimes you need to be a little unselfish, give in a few more times than you want to.
then there's everything else, is she stressed, going through a hard time that she hasn't told him about, does she work long hours, have a lot to take care of at home, is he supplying her the other hundreds of things she needs from their relationship....