No, the weak second house is for your horoscope. Your spouse could be having his/her own qualities and he/she could as well be rich depending on his/her horoscope. The marital happiness of 49.57% is for you as you would feel it. Perhaps your spouse could have a different unit of strength for marital happiness. You read my articles on Marriage on http://navagrahastro.blogspot.in/ to get an idea of the grading of the strength of houses.