I believe that it's pretty much standard that whichever PTT is pressed (left seat or right seat), that mike is the only one connected to the Tx. There may be exceptions to this rule, so don't assume anything!
Mrs CB has been flying often with me - doesn't enjoy coming up on check rides with instructors where there's lots of circuits. steep turns and a stall or 2!!
Enjoys it when there's food and refreshments at the end of the journey!!