ALLENTOWN, Pa. (AP) — A 15-year-old Pennsylvania girl who pleaded guilty to plotting with her soldier boyfriend to kill her mother has taken the stand at his murder trial, saying in his defense she’s “inexorably, ineffably in love” with him.

Jamie Silvonek’s testimony was a surprise at Army Spc. Caleb Barnes’ trial Friday. On Thursday, she was slotted to testify for the prosecution as part of her plea deal but wasn’t called to the stand.

The 22-year-old Barnes is accused of stabbing Cheryl Silvonek in March 2015 in Pennsylvania.

The Morning Call of Allentown reports (http://bit.ly/2aRANn5 ) Jamie Silvonek read aloud from a letter to Barnes. She also says she had no physical part in killing her mother.

Silvonek was 14 at the time of killing and pleaded guilty in February. She’s serving 35 years to life.