Australian teen girl discovered by brother's wife while masturbating leads to sexual encounter

A young American guy and his Canadian girlfriend were staying with his Australian mate and his wife. The girl was in the bathroom when she heard noises from the next room and decided to investigate. She found his friend pleasuring himself. The sight of his friend's arousal was too much for her to resist, and she joined him in the act. She started by giving him a blowjob, and then they moved on to other sexual acts. The guy's girlfriend walked in on them and was initially shocked but soon joined in. They all engaged in a threesome, with the girl showing off her sexual prowess. The girl was very skilled in pleasuring herself, and she taught her friend's girlfriend some moves. The guys were impressed by her sexual skills. After the threesome, the girl's boyfriend joined back in, and they continued their sexual escapades.