it should be a matter of managing the time you put into these two things. yes, the wife is much more important than the guitar and playing it but since its your passion to play, i cant understand why a good dialogue with your wife wont fix things.
like if you got work, when you get home, make sure you touch your wife before the guitar. and when i say touch - hug her, kiss her - make her feel wanted. talk to her during dinner then after, you can help her with the dishes and then, tell her youre going to play the BLUES for a couple of hours. but when you say a couple of hours, make sure you pack up after a couple of hours.
assuming that you have a loving wife, keep this in mind: you wife will love you back but the blues wont.