Terrence Williams, accused of brandishing a firearm Sunday afternoon during an argument with the mother of his 10-year-old son, had bail set by a judge at $25,000 during a court appearance yesterday in Kent, Wash. The next hearing for the Celtics guard, who posted bail and was released, will be held tomorrow, stemming from his arrest following a confrontation in an apartment complex parking lot. He is being investigated for second-degree domestic assault. King County prosecutor’s office spokesman Dan Donohoe confirmed last night that Williams’ son stepped between the adults after Williams pulled out a handgun. Williams, 25, had driven into the parking lot with his son for what was described as a visitation exchange, and was approached by the boy’s mother and her boyfriend. That’s where the story diverges. According to a probable cause document provided to the Herald, the woman told police she wanted to ask Williams about “disparaging” comments he had made about her other children, but he refused to get out of the vehicle. She started banging on the hood of the vehicle, insisting that they talk. The woman told police that Williams then pulled out a handgun and pointed it out the driver’s side window at her. She said their son stepped in front of Williams and she backed away as Williams drove off, waving the gun. Williams, arrested later that night beyond the Kent city limits, admitted to police that he did indeed pull out the gun, but said he didn’t point it at anyone. He told police that he felt threatened when the woman started kicking the front of his car after approaching with her boyfriend, adding that he sensed a third person approaching from the vehicle’s passenger side. He said he pulled out a handgun and, holding it to his side, briefly stepped out of the vehicle, then eventually got back in the car and drove out of the complex.