Complex sentence: The extent of her role in this position, however, is likely overstated, she may have represented her son, played a role in meetings and answering queries, however, the final authority on these legal matters was Caracalla.
Split into simpler sentences: The extent of her role in this position, however, is likely overstated. She may have represented her son-played a role in meetings and answering queries-however, the final authority on these legal matters was Caracalla.