Solo appeared in court Monday and was released without bail. She was ordered not to have contact with the alleged victims and to not drink alcohol.
Authorities say Solo was intoxicated early Saturday when she was accused of assaulting her sister and 17-year-old nephew. Police say a family called 911 to say Solo was "going crazy and hitting people."
When police arrived at Solo's sister's Kirkland house, they heard shouting and found Solo's sister and nephew crying and with visible injuries, according to court documents. Police say the nephew's shirt was ripped and his face was red and had marks on it. He also had a bleeding cut on the bottom of his left ear.
The boy told police, "We just let her back into our lives," and said Solo "always does this." He told police Solo arrived at a family gathering earlier that night and appeared to have been drinking.
He said Solo drank more wine and later became upset and began berating him, calling him "fat" and "crazy," according to court documents. That led to a heated exchange that turned violent when Solo attacked him, the boy told police. The boy's mom jumped in to stop the attack, at which point police say Solo punched her sister.
The boy found a broken BB gun and pointed it at Solo, telling her to leave the house. She did, but then walked around the side of the house, jumped a fence into the back yard and reentered the house through another door, according to court papers. The boy said once she was back inside, Solo began attacking his mother again.
The boy called 911 at some point during the incident, and officers arrived just as the boy was preparing to hit solo with an aluminum mop in an attempt to get her off his mother, police say. Speaking with police, Solo denied attacking anyone and said her nephew hit her in the head with a broomstick because she called him "fat and unathletic."
Solo was booked into jail for investigation of two counts of fourth-degree domestic violence assault.
Meanwhile, Solo's attorney insisted that she herself was a victim in the altercation.
"Hope is not guilty of any crime," attorney Todd Maybrown said in an email to The Associated Press Saturday. "In fact, our investigation reveals that Hope was assaulted and injured during this unfortunate incident. We look forward to the opportunity to present the true facts in court and to having this matter behind Hope very soon."
Her next court appearance is scheduled for Aug. 11.
The 32-year-old Solo has won two Olympic gold medals with the U.S. women's national team and also plays with the Seattle Reign of the National Women's Soccer League.
In 2012, she married former Seattle Seahawks tight end Jerramy Stevens. He was arrested just before their wedding for investigation of assault after a disturbance involving her, but he was not charged. Maybrown represented Stevens in that case.
Solo said soon afterward that there never was an assault and that she and her new husband were happy.
Stevens was in the courtroom Monday but declined to speak to the media.