The CW's LIFE UNEXPECTED: High School Student-Teacher Sexual Affair

On s02e02 of The CW's Life Unexpected, 16-year-old Lux discovered that Eric was her new English teacher - after they kissed. 

Lux wanted to continue the age-gap relationship, but for obvious reasons, Eric wanted to stop seeing his student romantically.

English Teacher, "If I would have known that you were 16!" 

Student, "Then nothing would have happened." 

Thus, Lux admitted that she didn't disclose that she was a nymphet, because she feared that she and her English teacher would not have "made out". 

(IRL, despite the fact that Lux admitted that she lied about her age, Eric would have been fired and, possibly, he could have served jail time, but, in all likelihood, Lux would not have received even a proverbial slap on the wrist.)

Unsurprisingly, Eric was unable to resist the allure of a student-nymphet and by s02e07, Eric gave in and continued the age-gap affair with Lux, but Tasha, Lux's best friend, caught the teacher and student kissing. 

Despite the fact that Lux lied about her age, she would not have received even a proverbial slap on the wrist for strongly inviting her teacher to an affair. 

Life Unexpected only lasted two seasons. In contrast, Pretty Little Liars last seven seasons while the English teacher precariously decided not to end his affair with his high school student.