If the sister does not go to Mohammed, Mohammed goes to his sister. His half-brother had his eye on his sister for a long time, and she was playing the innocent chick. Only when he took his dick out of his pants did her eyes open to the fact that he could make a good lover. Yeah, and her pussy was leaking before she came to her senses. And what happened was, she took it in her mouth. So females only resist for the first few minutes, until the front starts dictating their will to the head.
All sisters are like that - at first no, no, but after a sleepless night they get their own dick in their pants. They just need to be given time to fantasize - with their wet pussy alone.