Young sister is ready to suck her stepbrother for a gift

My half-sisters character is much worse than her pretty face, and therefore the cutie quarrels with another friend every month and therefore walks unsatisfied. And today she falls into my room when I watch TV. The girl does not try to hide her intentions, and I am not going to refuse to have sex with her. So she kind of prevents me from watching TV, and I really bang her for such impudence.