SINGAPORE (AFP) - Singapore’s parliamentary Speaker announced his resignation Wednesday after confessing he had an extramarital affair with a community worker, setting off a fresh sex scandal in the city-state. Michael Palmer, 44, a married father of one who was only sworn in as Speaker in October 2011, also quit his seat in parliament and membership of the ruling People’s Action Party (PAP). “I have resigned to take full responsibility for a grave mistake that I have committed,” Palmer told a press conference.  “My conduct was improper and it was a serious error of judgment. I have resigned in order to avoid further embarrassment to the PAP and to Parliament,” he added.