DALLAS, Ore. — A woman in prison for plotting to kill a Dallas couple in 2010 has been sentenced in a separate case to 16 more years in prison for sex abuse.

The Salem Statesman Journal reports 49-year-old Cindy Lou Beck pleaded guilty to two counts of first-degree sodomy, admitting to sexually abusing a boy under the age of 16.

The abuse occurred within a three-year span starting in April 2007. The paper said the sentence was imposed Oct. 29.

Beck was already serving a 20-year sentence for conspiracy in the killing of David and Marilyn Jondle.

Prosecutors blamed Beck’s influence in the case of Andrew Jondle, who was sentenced to 50 years for killing his parents with a metal pipe and hay cutting sickle on their farm outside Dallas.