PS - Did you test positive for any of the gluten antibodies? GI guys cling to a strict definition - you must be positive for anti-ttg or anti-emsa and have a positive intestinal biopsy. But I see patients all the time who have lesser degrees of antibodies - like, only positive for anti-gliadin IgG or IgA - who respond fabulously to a gluten-free diet and are very symptomatic when gluten is re-introduced. So it's often just a matter of semantics, who has celiac disease and who is gluten-sensitive.
Either way, you daughters should be tested as the tendency is hereditary.
N-acetyl cysteine, btw, has been studied and seems to be effective for about 2/3 of compulsive gamblers. Of course, your W would have to admit she has a problem first. (She didn't by any chance has gastric bypass surgery or start any prescription medications, did she? Sometimes these can set off compulsive gambling. More likely, her stress and depression have just made her susceptible to the dopamine "high" of gambling).
