She probably had other plans. Turns out "Mandy" is Amanda White. She is 27. Her husband is a youth minister at Victory Baptist Church in Burnet, Texas.
She is now charged with felony solicitation of a minor. According to the Austin American-Statesman:
Along with letters and cards, Mandy — as she called herself — left him gifts of bras, underwear, condoms and K-Y personal lubricant, the affidavit said ...
Police confiscated 50 to 75 handwritten letters and cards that White wrote to the boy, according to the affidavit. Nelson said the letters were written in the last half of the summer.
White told police she started writing the letters as a game after she had seen a photo of the boy on a friend's cell phone, the affidavit said. White told police that the letters were "very dirty" and that she knew it was wrong to write them, according to the affidavit. White also told police that she knew the boy was a minor, the affidavit said.
The boy said he would go to White's house to pick up the letters that he thought Mandy had left for him, the affidavit said. He thought he was going to meet with Mandy and have sex with her, the affidavit said.
He told police that Mandy called him all the time and that they had phone sex, according to the affidavit.