If I may, I believe that what your wife is saying could have little to do with the time you spend on one thing, but possible the feeling that for some reason you are not paying enough attention to her. If so, several problems attend to that. It may be that you have feelings you may not be aware of that are making her feelings factual. Another is that her fear you aren't interested in her in a way that is reassuring will cause her to express a neediness that will drive anybody away. If the situation is bad enough perhaps third party counseling could help.