Is nothing sacred?

Which still-active soprano has not only begun teaching, but has quickly moved on to the next rung of the pedagological ladder, i.e., interstudio politics? It seems our heroine was invited to a student performance, only to find the teacher of the student in question also in attendance! Air was kissed for public consumption, but once our heroine exited the coulisse, the veteran professor sniffed, “How dare she try to poach from my studio!”