When I hit the menopause everything seemed to stop now it's when the feeling hits well I'll not go into detail lol,so I would say that your wife is telling you the truth and that it isn't you...and if you are still having relations then that should tell you something about her and that it's not you. Make sure that she knows you are there for her and I don't mean for the sexual side for everything, as going through the menopause can make some women feel really crap.