How Playing with a Friend's Couple Ended up in Ntr Swapping

"What do you want to do? Do you want to have a drink at our house?" So my stepmom's friend and her husband and I decided to have a drink at home. After that, we were all , and my stepmom's friend's wife seduced me! She said, "Your husband's home, it's not a good idea." "But you've got a boner, right? Oh no! My wife is resting! She won't know? Oh, no! Oh, you! My wife is with my stepdad's friend, too!