While I didn’t get married into my 30s, my close friend got married much younger at 21.
By the time they were 8 years married, there were some issues in the relationship. But, they started solving them with inviting people into the bedroom. At first, it was only other women. My friend’s wife brought in her friends, and once a random they picked up at the local bar.
Finally, she said she wanted to try another guy, and told her husband that she wanted to try with me first.
I made him ask me 3 times, because I was really wary of what would happen afterwards. Finally, one night at their house after some bourbon, I agreed.
The rules were simple: we would move to their bed room, where we would focus on her. I had to wear a condom. No hitting or choking, but light spanking was okay. No butt stuff. Finally, I had to leave the room after I finished, so they could finish together.
She was wearing a skin tight black body suit and tan jeans. Although having 2 kids, she had a great body. DD tits that only sagged a bit, and a little bit of soft belly. All packed on to a frame that was 5’3″.