10/01/2014 08:58 EDT | Updated 12/01/2014 05:59 EST

Stabbing case in Regina involves social worker and former client

A stabbing case before the courts in Regina has taken an unusual turn with an allegation that the victim and alleged stabber were involved in an inappropriate relationship.

Colleen Piapot, 21, appeared in court Wednesday on a charge of attempted murder. Piapot is accused of stabbing a long-time social worker multiple times. She was arrested on Sept. 17 when, according to police, a 49-year-old woman was taken to hospital with stab wounds following an incident that took place in Regina's Cathedral neighbourhood.

Outside of provincial court Wednesday, Piapot's sister Terrilyn told CBC News that she and Colleen were once clients of the social worker.

"She used to be our social worker when we were young kids and we were in foster care," Terrilyn Piapot, the older of the two women, said outside court. "I guess Colleen has kept a relationship with her all of our lives."

She also claimed that the relationship involved some questionable activities, saying the social worker gave her sister money, food and alcohol.

Colleen Piapot's next court appearance was set for later in October.

There was no immediate information available on the condition of the injured woman.

A confidential source has confirmed to CBC News that an investigation has begun in the ministry of social services, looking into the allegations.

On Wednesday, officials from the province declined to comment on the case noting the matter was before the courts.

In a statement officials said that staff in the social services ministry "are required to conduct themselves in a professional and ethical manner. Any allegation of staff misconduct is treated very seriously and thoroughly investigated."

The government added that when allegations of misconduct do arise such cases are investigated and would include the employee's union.