Joy-Anna Duggar

Joseph Duggar's arrest on child molestation allegations prompted an email from his brother-in-law Austin Forsyth ... with Austin offering to help Joseph's wife, Kendra Duggar, get through things. In new legal docs, obtained by TMZ, there's an email exchange between Joseph and Austin, who is…

Joy-Anna Duggar says her brother Joseph Duggar's alleged actions are disturbing ... adding she's been a total wreck since he was arrested. Joy-Anna posted her statement to Instagram on Thursday ... telling her followers that the allegations against her brother are "heartbreaking and deeply…