Is it permissible for a man to masturbate with his hand on his wife's body (her back, face, buttocks, or any other limb)?

A man's masturbation with his own hand is forbidden, whereas his masturbation with his wife's hand or with any part of her body is permissible. It is not permissible for a man to use his own hand for masturbation, even if he intends to ejaculate on his wife's back, face, buttocks, or any part of her body.