A twisted Texas elementary school teacher is accused of sexually assaulting a fifth-grade student she branded as one of her “favorites” – as cops urge other possible victims to come forward. Cecilia Mueller, a 46-year-old longtime Northside Independent School District employee, was arrested Monday after a former student, now 20, reported the disturbing sexual acts he endured while he was in her fifth-grade class during the 2016-17 school year, according to the San Antonio Police Department. The victim told authorities the then-36-year-old sicko kissed him and carried out other sexual acts while they were in a closet inside her classroom, a police report obtained by News4SA said. Cecilia Mueller, 46, was arrested Monday and charged with continuous sexual assault of a child. San Antonio Police Dept. On one occasion, the pair were allegedly kissing while Mueller’s young child was in the classroom. The teacher waved off any concern, saying her youngster “wouldn’t remember” what had occurred, the victim said.…