NSW Premier Kristina Keneally says she is fed up with the self-indulgent behaviour of Labor MPs and their staff following the latest scandal to engulf her damaged government.

After the arrest on Friday night of Matthew Chesher - a longtime Labor staffer and husband of Education Minister Verity Firth - over the purchase of an ecstasy tablet, Ms Keneally said today she was "furious" over the new crisis.

NSW Minister for Education Verity Firth, and her husband Matthew Chesher (inset). Credit:Simon Alekna

"I have run out of patience for self-indulgent behaviour," she told reporters this morning at the opening of the Inner-West Busway.

While she refused to reveal details of her private conversations with Ms Firth, who was reportedly unaware of her husband's apparent drug use until the bust, the premier said "my heart goes out to her".