NORMAN, Okla. (KFOR) -- Former Tishomingo schoolteacher Shelley Jo Duncan was back in court on Wednesday. She is accused of having an inappropriate relationship with a 14-year-old student in 2016.

Earlier this year, a mistrial was declared after jurors were unable to reach a verdict in her case.

On Wednesday, the alleged victim, now 16, took the stand during the third day of testimony at Duncan's re-trial.

The teen told the jury that initially he viewed Duncan as someone he could talk to about anything, someone he could go to for advice.

But as time passed, he started viewing his teacher more like a girlfriend.

The boy's mother also testified on Wednesday, saying she she felt a "loss of control" when her son would spend time with Duncan.

Prosecutors allege that Duncan engaged in sexual acts with the teenager twice -- once in her truck and another time on school property.

The boy's mother said Duncan would buy her son lavish gifts and take him with her family, but failed to return him until well after his curfew.

The defense introduced text messages exchanged between Duncan and the boy's mother. Some, from Duncan, told the alleged victim's mom that she loved him, and never minded helping out her children.

The defense pointed out that the boy's mother never said she was uncomfortable with how Duncan treated her son.

The teen's stepfather also testified on Wednesday, recalling what he described as a strange interaction between Duncan and the boy at the county fair. That's where the stepfather claimed he saw the former teacher hang on the boy's arm and rub on his chest as though they were in a relationship.

The trial continues on Thursday.

Reported by KFOR's Lili Zheng