I have another older family member, who was at home full time. She never knew what her husband earned. She had access to money through cheque books etc, but had no idea of the big picture. She would worry if her husband made a big purchase, because she had no idea whether they could afford it. On the other hand, he would talk about his thriftiness regarding other purchases. So she was getting mixed messages. She was very sensible with money as it happens.
I have seen this scenario on a number of occasions and think that it is a very cruel thing to do to anyone. Two different women that I knew were left totally unable to manage when their husbands died suddenly. In one case she spent all the money in a short number of years because of her lack of experience in handling finances. Offers of help or advice were refused through embarrassment.