An instructor should develop the abilities of his female students, notice their inclinations and act in that direction. And this maiden was best at playing the leather flute. This ability will benefit her a lot, not only in her studies, but also in everyday life. The main thing is daily rehearsals and on different flutes.
Sister sucks just great, hehe, but apparently not only her mouth wanted to feel the smell of the male, her pussy probably wanted a rough ride, so he fucked her as it should be))!