Поругался с изящной подругой и теперь долбится со сводной сестрой

Well, as it usually happens: stepbrother had a fight with his girlfriend and now he has no one to fuck. And everything would be even worse than now, but sister dreams to get married soon, and therefore asks brother to teach her love affairs. But the most important thing is that the study is not in any way harmful, but quite the opposite