Court records said Lumpkin was sitting on the couch with the teen when the other boys went out to smoke. While they were alone, he started touching her and the two started kissing.
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Eventually, the boys returned and Lumpkin stopped kissing the teen, the affidavit said. Later that evening, the teen reportedly began kissing and touching Lumpkin again. The victim said Lumpkin stopped kissing him and went into her bedroom, according to the affidavit.
The arrest affidavit said the victim waited two hours for his friends to fall asleep. He then woke her up, and the two had consensual sex, according to the arrest affidavit.
The boy told some friends the next day what had happened. One of his friends told their father, who informed the victim's family.
Lumpkin was arrested Thursday.