A 34-year-old man was today charged with sexually assaulting a woman at knifepoint in her car during an incident at Warwick Long Bay on Monday.The defendant, who cannot be named for legal reasons, was also charged with depriving his alleged victim of her personal liberty and unlawfully wounding her.The man was not required to enter pleas as the matter must be dealt with in Supreme Court.The matter was adjourned to July 12 and he was remanded in custody.