Well, in modern relationships, sexual exploration is a part of personal growth. If a wife chooses to use a dildo, it could be for various reasons like self - discovery or when her partner is away for a long time. However, communication within the relationship is key. If both partners are open and understanding, it can be a normal aspect of their sexual life.
It's a personal choice. Some may see it as a way to explore one's own sexuality privately, as long as it is within the boundaries of a healthy and consensual relationship.
I think it's important to note that any form of sexual expression should be based on respect and consent. For a wife using a dildo, it might be a means to enhance her own sexual experience. But society often has taboos around such topics. In a more progressive view, as long as it doesn't harm anyone and is done in the privacy of her own choice and with the understanding of her partner, it can be considered just another aspect of human sexual behavior.