Hell most guys love to watch me masturbate and I enjoy putting on a masturbation show for anyone wanting to watch. Sometimes pleasing one's self by masturbation is only natural and normal however if your wife is doing it to the exclusion of no other sex than I can only guess that there is other underlying causes such as she is pissed off at you for some reason or there are other issues in your marriage. You should ask her why she isn't interested in sex with you. Offer to help her masturbate. Hopefully she at least allows you to watch. If she does than masturbate yourself as she is masturbating herself. Hopefully that will lead to more. If all else fails you might want to seek counseling. Good luck my friend. I wish you the best. Please respond back hopefully with happier news that things are working out.