An Alpharetta mother pleaded guilty Thursday to seducing her daughter’s boyfriend and having sex with him, Channel 2 Action News reported.

Kathy Tompa will spend 15 years in prison after she admitted she had a sexual relationship with the 15-year-old for six months.

Tompa was originally charged with child molestation and rape in May, but few details on the case were released.

In court, the boy’s mother told the judge that her son had to move out of Forsyth County because of the humiliation it caused him.

“She stole my son’s innocence,” she said. “She stole his childhood. I’m angry with her and I’m angry with myself.”

Tompa had been in contact with the boy since December 2015 through sexually explicit text messages, Channel 2 reported. At one point, she groomed the boy for a sexual relationship with her daughter before persuading him to have sex with her.

“She was advising him on how to kiss her daughter, how to touch her daughter, when would be an appropriate time to touch her buttocks, what would be the appropriate time and manner to remove her shirt,” Forsyth County Assistant District Attorney Heather Dunn told the judge.

Dunn said Tompa eventually invited him to her home for sex late one night while her husband was away on business, Channel 2 reported.

The teen’s parents noticed changes in him and that his grades were slipping.

When they took his electronics away, Tompa bought him a cell phone and installed Facebook and Snapchat on it so she could continue talking to him, Dunn said in court.

Tompa also helped the boy sneak out of the house and hide the affair from his parents, Channel 2 reported.

Tompa has to pay a fine and the boy’s therapy services. She must also register as a sex offender.

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