Texas Attorney General Greg Abbott  on Monday sued a couple, John J. and Frances Stuart, charging that their business was engaged in illegal marketing techniques by telling parents that their children had expressed an interest in materials they were selling. The business -- SAT and ACT Prep Center Inc. -- sells test prep materials. State investigators found that the company called parents, claimed that their children wanted the materials, and sold them for $120. Many parents later reported that their children never requested the materials. Further, the state found that the materials could be found online for about $10. A lawyer for the Stuarts told the Associated Press  that they deny any "intentional or systematic wrongdoing."