The D.C. woman convicted of orchestrating a plot to splash liquid Drano on a woman and her 3-year-old daughter in Oxon Hill in 2010 was sentenced to 15 years in prison Friday, authorities said.

Tamara Jackson, 31, was convicted in May of conspiracy to commit first-degree assault and related counts in connection with the March 29, 2010, incident that left the woman and her daughter permanently scarred, prosecutors said. Prince George's Deputy State's Attorney Donnell Turner said Jackson was motivated primarily by “jealousy,” plotting the attack simply because the woman was starting a relationship with Jackson's ex-boyfriend.

That ex-boyfriend, Turner said, was the father of the 3-year-old girl. He said investigators believe Jackson intended to hurt her — not just her mother — in the attack in the 1100 block of Kennebec Street. Both mother and daughter were seriously hurt, though their injuries were not life threatening, Turner said.

Also Friday, Tikia Anderson, 31, of Bladensburg, the woman who actually threw the Drano, was sentenced to eight years in prison, prosecutors said. She had pleaded guilty to first-degree assault and agreed to cooperate in the prosecution of Jackson in exchange for that sentence, prosecutors said.

Turner said though Anderson threw the Drano, Jackson “planned and orchestrated” the assault.