Can i sue my employer for this?

I can't speak to your question about TABC requirements.  The TABC website has a pretty good FAQ section and seems easy to navigate. Employers with 15 or more employees are prohibited by law from sexually harassing employees.  The employee has an obligation to report the harassment to management or to the Company's HR department unless the harasser is the only person to whom such a report could be made.  It is also against the law to punish or terminate an employee for making a complaint or for serving as a witness in someone else's complaint.  If the matter cannot be resolved internally, you must file a complaint with the EEOC or Texas Workforce Commission - Civil Rights Division within 180 days of the date of the harassment.  You can actually make such a report up to 300 days from the date harassment but any report after 180 days limits your remedy to a federal lawsuit.  Federal courts in Texas are not regarded as the best place to bring such a lawsuit.  Almost any employer who makes an employee work off the clock is breaking a number of different laws.  Your are entitled to be paid your regular hourly wage for each hour of work and you may also be entitled to overtime for each hour of work over 40 hours in a single work-week.  Complaints about failure to pay regular wages can be directed to the Texas Workforce Commission - Labor Law Department.  Complaints about failure to pay overtime can be directed to the US Department of Labor Wage & Hour Division.