This is purely anecdotal, but I think my piano teacher’s wife, a realtor, is falling on hard times. The piano teacher used to refuse weekend lessons. Today he told me he is now teaching on Saturdays!!! Thus, he is taking more students, or having to work Saturdays to get students who are not available during the week. To me, this indicates they need the extra income.
One more thing: they bought a new house last summer. I can only guess it was bigger than the previous house, since her commissions had been so lucrative for many years.