Rape by a stranger by the river

Two girlfriends came to the river, admire the scenery. A stranger attacked them from behind. He hit the girl on the head with a stick and knocked her out. The second girl was expected to rape by a stranger. He turned the unfortunate on his back and began to fuck. He tried to strangle her with his hands so that she would resist less and not interfere with him. Having fucked baby, maniac wondered how to repeat this.