HAPPILY married men should pray their wives are not among the anonymous contributors to Romi Lassally's upcoming book, "True Mom Confessions: Real Moms Get Real," out next month from Berkeley. -snip- Another notes: "I constantly fantasize about leaving my husband . . . for another woman." And one reveals: "Sometimes when my husband and I are in a fight, I purposely wear sexy underwear just to rub it in that he won't be getting any that night."