This has little to do with you and lots to do with the
paraprofessional who should be working for the benefit of the
children and the school first and foremost. Second, you are the
teacher; you are in charge. If the paraprofessional is not able
to work under your leadership, you should first counsel with
the paraprofessional and, if positive results do not ensue,
with you supervisor/principal. The safety and education of the
students is at stake. While this situation may seem like an
emotional turf battle between two adults, it is the children
who suffer when safety and instruction are sacrificed. Clinical
detachment is essential is the delivery of appropriate
instruction for all students.
Good luck. It's your classroom. And you are the teacher.