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.
I can see it's not the first time they've had sex together. It's so convenient - you don't have to take anyone off, there's always a shower and a bed nearby. Of course, her brother's dick is great, so any sister would fall for one and suck it at the first opportunity. Well, it seems to me, he doesn't mind having fun with his sister with it either - his own soulmate won't betray him or make him marry him. It was so cute when her brother came inside her - it just cheered them up. )