All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
Yes, it is permissible for a wife to shave the pubic hair of her husband even if this leads to looking at his private parts because it is permissible for each spouse to look at the private parts of the other as clarified in Fataawa 87701 and 83392.
Allaah Knows best.