A private tutor or lecturer gets an erection when he sees a mother who is so engrossed in her child that she accidentally flashes her panties. Unaware that his own panty flash is the cause, the mother who sees his erection has a stain on her panties... When the man can no longer resist and approaches, her body, which has been neglected for a long time, begins to ache, even though she resists, and gradually she becomes obedient, moaning loudly from the pleasure.