Patricia Davenport was sentenced to five to 10 years in state prison.
Authorities say it all began back in April, 2014, when Davenport and a friend implored Davenport's teen daughter to snort the drug on the kitchen table at their townhome in Montgomery Woods.
The addiction progressed through the summer and police say the family would soon be making almost daily trips to North Philadelphia to buy heroin.
Davenport would allegedly inject her daughter and her 16-year-old boyfriend on the ride home.
According to court papers, an 8-year-old step-brother would often be in the car.
Police say Davenport was exposed after a friend of the teen notified administration at the Souderton Area High School on the first day of school.
A nurse saw the teen's needle marks and authorities were immediately contacted.