A source confirms to PEOPLE that Anna Duggar flew to the faith-based rehabilitation center in Rockford, Illinois where Josh has been receiving treatment since publicly confessing his addiction to pornography and cheating on his wife.
Despite a difficult year for the Duggar family – just months before Josh's admission in August, a 2006 police report revealed that he had also been accused of inappropriately touching five minor girls (including sisters Jill and Jessa) as a teen – the family did their best to have a good holiday without their eldest son.
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A plane owned by the Duggars left Illinois Tuesday night and arrived back in Arkansas shortly after 10 p.m., according to aviation records.
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A second source says Anna took their youngest daughter, Meredith Grace to see her dad a month ago on the family's private plane.