Couple slave, this is a term that often appears in SM novels. It is not common in the real SM world. However, I was lucky to have met a couple with such a tendency recently, and actually experienced the process of playing SM with real couples. I will write a brief story and share the experience with you. Now, the topic of 3P is very hot. There are slutty wives who tend to like to have sex with their wives with others, or there are many people who see their wives having sex with others. I have also come into contact with such netizens before, and actually play 3P with couples. But those sex that is only special at most, and there is no SM plot. However, the experience of playing 3P with other couples has helped me a lot in training this time, because the other party recognized my previous experience and then further contacted me.