I don't know how much SSM will do for you. I skimmed it when I was DBing post-bomb, and it seemed more for couples who were NOT having sex with any regularity -- meaning maybe a few times a year or less. There are a LOT of Ms like that.
But, you seem to have a pretty active, regular SL.
PM (Passionate Marriage) might be good though... Also, the Good Vibrations Guide and the Dirty Girl's Guide to sex are great.
