My neighbor's shameless wife always keeps her panties on during sex

There is this particular neighbor who happens to come from my state and he has an awesome wife. These two have an open relationship and her hubby has no problem sharing his wife with other men. I was really horny that day so I made them a tempting offer they couldn't refused. I ended fucking my neighbor's wife right in front of him. She was so horny that day that she didn't bother taking off her black panties.