A suburban Pennsylvania mother has been charged with buying heroin and injecting it into her 15-year-old daughter and her daughter's teenage boyfriend.

Lower Salford Township Police arrested Patricia Davenport, 35, on Tuesday on charges that she supplied drugs to minors. Her friend Megan Rudolph, 26, was also arrested for partaking in the act of sharing illegal drugs with the teens.

The Montgomery County mother allegedly introduced her daughter to heroin back in April. Subsequently, she and Rudolph then began taking the teens on weekly trips to North Philadelphia to buy the drug. On some occasions, Davenport even brought her 8-year-old son along on the trips.

The women and teens would then allegedly use syringes to inject the drugs into themselves and the teenagers while driving back home, said investigators.

"Mom was supplying the funds not only for herself, and others, but for her daughter," said Lower Salford Police Chief Thomas Medwid.

District Attorney Risa Vetri Ferman said, "I can't fathom these allegations. It's incomprehensible to me that any parent would introduce their children, their child, to drugs like this. And not just introduce them, but then perpetuate that addiction and obtain (the drugs) and inject them on multiple occasions," reports NBC Philadelphia.

Officials began investigating the case after they received a report that a student at Souderton High School was using drugs supplied by her mother. About a week later, a girl told a school guidance counselor that she saw the same juvenile using heroin with Davenport.

A nurse also saw needle marks on the teen's arms and authorities were immediately contacted, reports ABC 13.

The women face 11 different charges, including corruption of minors, child endangerment, reckless endangerment and drug counts.

Davenport is currently being held behind bars on a $50,000 bail, according to court records.