My foursome experience story 😟

My boyfriend and I were talking about having a threesome for so long. We've been together 9 years since July and we have a great relationship so decided that we would do it for our anniversary. So we got online to a dating website as a couple seeking another couple for causal sex as a once off.. after days of finding absolute freaks we found a wonderful married couple who were spicing things up for their 4th wedding anniversary! We chatted to them for a few days and had a webcam chat to just to be sure before we met them. 
They came to our house when the day came and it was a little awkward at first we decided to all have a few drinks to make the mood light, we went up to the spare bedroom as we had it all set up we all got naked and got under the covers, we spent over an hour kissing and touching each other's bodies it felt so damn good.. we then had the men lying down and we both got on top of our own men and rode them together then got in a 69 position for a while I was so so close the entire time I've never been so turned on in my life, we got a bit more adventurous and I went down on her while her man and my man double penatrated me, then they done it her while she licked me out, her and I had a 69 while getting it in the ass off the guys, we sucked their dicks together swapping and changing , sitting on their faces, she squirted all over my man while riding his face , then finally I had the most mindblowing orgasm while being in a 69 with her (me at the bottom) as my man pumped his dick and cum into me. Then I sat on her face while she ate out my mans cream and her man fucked her at the same time she came and squirted again! Her man pulled out his dick and came all over her pussy, both her and I then rubbed our clits together and I was able to reach orgasm again the guys just watched and played with their dicks until it was time to go again! It was the most amazing experience ever!
Has anybody ever had a threesome or more with their long term partner? Has it effected your relationship? Our relationship has been so much better since 😱