The older brother of murdered toddler Cheryl Grimmer will remain behind bars until at least April amid allegations he sexually assaulted a woman three times between 2017 and 2018.
Stephen Grimmer, a self-confessed child molester who is due to be sentenced in two weeks for an unrelated matter where he fondled a 14-year-old girl, repeatedly shook his head as details of the allegations against him were aired in Wollongong Local Court on Monday.
Police will allege Grimmer twice attempted to force a woman he knew to perform fellatio on him, while on another occasion he allegedly raped her.
The incidents are alleged to have occurred sometime in 2017 or 2018.
"At no time did the victim consent to any of these incidents," police said in documents tendered to the court on Monday.
The woman told her fiancee about the alleged abuse in September 2018, claiming Grimmer had touched her on the breasts and vagina and sexually assaulted her.
The woman made a statement to police in June 2019.
Grimmer was interviewed by detectives in September and denied the allegations.
He was arrested at his Mount St Thomas home last Friday, taken to Wollongong Police Station and charged with one count of aggravated sexual assault and two counts of attempted aggravated sexual assault.
In court on Monday, Grimmer's lawyer said he could live in Queensland with his brother Paul, or alternatively they would rent a hotel room for him away from the Wollongong area. She said the case against her client "wasn't particularly strong".
Police opposed Grimmer's bail application, noting he was awaiting sentence on the child molestation charges.
Magistrate Robert Walker found Grimmer presented an unacceptable risk to public safety if he was released from custody and refused him bail.
Grimmer, along with his brothers Paul and Ricki, have spent decades trying to unearth what happened to their three-year-old sister Cheryl, who disappeared from Fairy Meadow Beach in January 1970.
Police suspect Cheryl was kidnapped and murdered but the case remains unsolved to this day.
A Victorian man was arrested in March 2017 and charged with Cheryl's murder however the case against him was dropped in 2019 after key evidence was ruled inadmissible for use in court.
There is no suggestion Grimmer was responsible for his sister's disappearance - he was only six years old at the time.
Meanwhile, Grimmer will return to court in two weeks for sentencing on the child molestation charges.
The fresh offences have been adjourned to April 1.