私の義理の妹は陰茎が何であるかを知りたがっています、そして私は彼女に彼女の人生で最高の解剖学クラスを与えます

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.