Can couple threesome ruin your relationship?

When you are dreaming about couple threesome, have you think about this kinky date would ruin your current relationship? You and your partner have been together for a long time, and for these years you two are exclusive to each other. And now, you are going to invite another people join your sexual life. Can you sure you partner won't be jealous or upset about this idea of threesome dating. Before you have a threesome dating, you should have a thoughtful communication with your partner. In this way, you can deal with all these unexpected issues.