Lesbian triple between a student and two teachers

Young students are most often embarrassed to admit that they are lesbians, because they are afraid of hostility of society, although in our time it is quite natural, and lesbian is much better than gays. It is difficult for a lone lesbian, so the student Kirsten sometimes retires to the classes not visited by anyone, and masturbates. But today, fate is thrown by two teachers who turn out to be lesbian, and arrange a triplet with this lecher.