I should perhaps mention that we only joined one of the bands as a couple (prog covers band that never got to gigging because of trying to recruit and keep a drummer). The other two bands, she was recruited by the band after me, and not from my suggestion. One of those bands already included one husband and wife, and didn't have any issues due to that. I know another band featuring a husband and wife which has been going for at least 30 years with no issues. From my own experience, I would say that your experience is the exception.