​In a working group, Nicole, shared that Beth made a rude co…

​In a working group, Nicole, shared that Beth made a rude comment under her breath. Nicole told Beth  it really upset her. Beth responded by telling Nicole she was being too sensitive. In a slightly raised voice, Nicole continued explaining why she was upset. Beth told Nicole to stop shouting and to calm down, which resulted in Nicole becoming even more frustrated. How should the group leader respond?