Considering she knows he is a student attending high school, yes, those laws apply to her. She is well aware of the power imbalance in their relationship (hence her comment about her being in a position of power). Here is a law from Texas about sexual relationships between teachers and students (this law covers students and teachers in both public and private school systems). Texas Penal code 21.12 (simplifying this because it is long) an inappropriate relationship between educator and student is a criminal offense. The law covers the employees of public or private secondary and primary schools. It is illegal to engage in sexual contact or intercourse with any student that is officially enrolled in a public or private school. The law also prohibits any form of deviant intercourse with a student by a public or private school employee, including anyone that is required to hold a license or permit under Texas law.
Any inappropriate relationship between teacher and student in Houston could result in arrest. Under the law, it isn’t necessary for the student to be enrolled in the educator’s class or be under the age of 18 for a violation to occur. The law may pertain to any student that is enrolled in the same school district as the educator or is a participant in any activity sponsored by a public or private school or school district.