With Teeth is definitely worth the trouble of taking a detour to Twilighted. Thank you, TalulaBlue.
Summary: Edward is a 27-year-old alcoholic/addict struggling with his recovery. Bella is a 23-year-old who's moved back home after college. This fic chronicles how they meet, fall in love, and struggle with the complexities of their relationship. Not nearly as maudlin as it sounds (I hope). Rated NC-17 for graphic (and sometimes non-romantic) sex, drug and alcohol use and abuse, profane language, and brief (very brief) suicidal ideation (although NO suicide attempts). No sexual assault, no cutting.
You can find it here. The beautiful blinkie is made by Rose Arcadia.