Swapping and fucking another person with your spouse watching as they also have sex with someone else from a psychological perspective is very powerful stuff. Be sure your relationship can handle the temptation and allure of a new body. I've acquired a few 'new' girlfriends that way and jettisoned a few old ones. Can be beneficial depending on your point of view.
I LOVE these fucking couples!! Pun intended. The little brunette is fucking hot and knows how to fuck! She enjoys her sex in all situations. Too bad her husband was into filming his wife fucking more than he was into filming the guys' wife he was with. I would have LOVED to see the blonde getting fucked!!