The Quality of Mercy

[sawyl]

Noticed the following in a Grauniad article:

A judge in Texas has banned a teenage drug offender from having sex as part of her probation, as long as she is living with her parents and attending school.

Christina Brazier, 17, pleaded guilty to possession of drugs, a crime which carries up to 10 years in jail and a $10,000 (£5,700) fine. District judge Lauri Blake, who sits in Sherman, 65 miles north of Dallas, ruled that to avoid jail Ms Brazier "shall not have sexual intercourse while enrolled in school and living with parents".

How exactly, is this supposed to be constitutional? Isn't there something about life, liberty and the pursuit of happiness? I think it's towards the back somewhere, maybe in the small print of the disclaimer...