My wife and I are both mid 30s and live in a fairly rural area. This happened back during the summer. There is a park near us with a lake that we usually go to and have a picnic.

My wife was wearing a tank top and tight little shorts that showed off her nice ass. We had some wine and she could see my staring at her ass and my boner in my shorts and asked if I wanted some help. She knew the answer and just smiled and pulled off my shorts and slowly started to suck my dick. I love when she gives me long slow blowjobs cause it builds up and I cum a lot. We have done this before at this park as we hardly ever see anyone around.

So I’m just laying back enjoying the scenery, weather , and my wife’s mouth moving up and down my shaft. I don’t know how much time has passed but at some point I look up and see a younger guy watching us. He looked probably in his mid 20s and maybe finished a hike as he looked sweaty and he was shirtless. My wife is on her knees kneeling down sucking my so he had a great view of her ass and he clearly enjoys it cause I could see he had a hard on.

I told my wife and she looked back and smiled and then asked me if I wanted to go. I told her no that I wanted to cum and she laughed and resumed sucking me. I guess he took that as a go ahead that we weren’t afraid or going to yell at him so he very boldly came up behind my wife and kneeled down behind her. She was a little tipsy and wiggled her butt at him and he just pulled down her shorts and underwear in one stroke and immediately buried his face in her pussy. She moaned but continued to suck me and I won’t lie I was so damn hard. I just enjoyed her sucking and then I saw him lift up his head and pull his shorts down. I couldn’t see his cock but I knew when he entered her because her eyes flew wide open and she started to suck me vigorously like a damn vacuum.
He was moaning how wet and tight she was and he started to fuck her at a measured pace so that in combination with her amazing sucking made me cum so hard in her mouth. I flooded her mouth and she tried to swallow but couldn’t take it all. He didn’t let up and continued to drill her from behind.

I stood up to put my shorts back on and it was surreal to look over and see my wife getting drilled. It was also a hot sight. My bubble butt MILF wife taking a dick from a young fit guy he continues for a few more minutes while she moaned loudly and cursed. I could tell he was hung but didn’t see how big and thick until he pulled out of her and shot his load all over her ass cheeks. Definitely the biggest dick she has ever taken.
He thanked her awkwardly and then left quickly.

I haven’t been back with her but I did find out later that she had been going back to the park and meeting up with him privately while I was at work. I caught her one day and followed her.