Broad announced he will not be seeking re-election following the scandal.
The couple declined to comment, but Broad told the Herald Sun via text message the couple – who have two children - will now aim to “strengthen and focus on our family”.
Following the news of Broad's alleged activity, several women have allegedly come forward claiming Broad behaved "inappropriately."
The Herald Sun reported that three separate women have contacted National Party officials during the past 12 months about Mr Broad’s alleged inappropriate behaviour online and in hotels and bars.
Those officials also told The Herald Sun that multiple women over the past three years had contacted the Nationals claiming “dalliances” with Mr Broad.
“I have resigned. Please respect my family,” Mr Broad told The Herald Sun.
Mark Riley, a 7 News Political Editor, spoke to the Morning Show on Dec. 18. about the newest allegations.
"Senior Nationals have informed me they are aware of at least two other complaints from women about Andrew Broad," he told Larry Emdur and Kylie Gillies.
"Mr Broad is also, of course, the man who demanded Barnaby Joyce stand down as leader over his affair."
"He built himself a moral pedestal which he's now fallen off," Riley adds.
Mr Broad has since quit his position as assistant minister to Deputy Prime Minister Michael McCormack.