20yr old wife & I invited to porn night with her bestie & hubby

Yeah - well, I had NO idea that we were being invited to watch porn with my wife's best friend and husband. I was told it was "cards".
My sexy 20 yr old blonde wife told me we had been invited to spend an evening with her best friend, and her husband. They lived just across the apt complex in Amherst Mass.
My wife had become close friends with this couple - the girls met in the community laundry room.
My wife spent a lot of time down in their apt. She eventually let me know that she found her friends husband very sexy!
Then - she mentioned that her loved to watch them go through their exercise routine on the carpet of their living room. My wife always headed out in a pair of her old loose nylon high school gym shorts. When I heard hubby was watching - I knew he must be enjoying a lot of "up-shorts" shots of my wife's tight little ass and her bikini panties!
Much later - she mentioned that he liked to remark on what color her panties were each visit. But that was later......
Then she mentioned that the poor fellow had a bad back - and that she'd offered and he had accepted her offer to sit on his thighs and butt and give him nice long intense back rubs. His wife - a little chubby gal - she GOT OFF on the flirting between the two!
So - we went to their apt with a bottle of wine. We all got tipsy - then hubby said it was "film time"....and wife and I sat on the carpet - he put the porn film in and we watched. I was drunk and turned on and upset that we're doing this in front of another couple. My wife sat between my legs, and in the dark I had my right hand up her hippie skirt and 2 fingers slowly stirring in her sweet young cunt!
There was one scene with the camera right between the legs, and we watched a close-up of they guys thick dick and heavy balls wetly sliding in and out of the girls pussy. The girls had him rewind and play this 1 minute scene several times - and my wife mumbled, "oh!...that looks soo nice!"
We went home and fucked like bunnies.
In a few weeks my wife left me and moved in with this couple. She said she was in love - plus the sex was great! "He is SOOO good at eating me! It's his favorite thing to do to me!"
In 2 mos his wife kicked them both out. My wife, having burnt two bridges! - flew to Calif. where her mother paid for the divorce.
Fortunately - no kids involved....though we'd married as teens.
The sex was great with thios girl for 2 years - but she couldn't keep her knees together. I put it down to the "fast So/California girl" syndrome.