Legal Question in Employment Law in Texas

You can't be forced to work any hours but your employer must pay you 1.5 times your regular rate of pay for hours over forty if you are not exempt from the overtime and minimum wage provisions under the FLSA and Texas Payday Act. If you are exempt from the overtime provisions then you do not have to be paid the overtime rate of pay. If you choose not to work the hours your employer has assigned then you can be terminated unless you work under contract that limits your hours.

So the bottom line is unless you work under a contract that limits your hours your employer can demand you work as many hours as there are in the week and it is free to discipline you for failing to work those hours.