Моя маленька зведена сестра хоче знати, що таке пеніс, і я даю їй найкращий клас анатомії в її житті

My shy stepsister wants to feel like having a dick inside, since in sexuality classes at her school she has seen a lot about those topics but she is afraid to consult with another person, and since we trust each other I teach her what it is.