Face Sitting

After doing some garden work for a neighbor, he paid me then asked if I'd like to enjoy myself.
Basically his wife Anna had been flirting all afternoon, and he said they were into face sitting.
In other words he wanted to watch his wife, who's forty six ride my face.
And if I was so inclined, she might let me fuck her afterwards.
I declined at first, not because she's not good looking or attractive to me, but because it creeeped me out a little he'd be watching.
About a fortnight later, I fixed a few wind blown trees for them, and it was after that I had my first experience with Anna.
He'd gone out leaving me alone with his wife, and Anna wasted no time inviting me in after I'd cleared the fallen tree's.
Lay on her sofa, she removed all but her lingerie, then spread her legs. Telling me she enjoyed TOTAL oral sex, I went down on her.
Only as I discovered, Anna likes to be in charge. Before long she had me naked and on my back, as she literally rode my mouth and face with her gorgeous pussy and asshole.
Not noticing, as Anna used me to reach one orgasm after another, I only knew once she lifted off of me, her husband Mike was indeed watching, masturbating and using what looked like a small dildo up his ass.
It did freak me a little, but by then I was so horny, and Anna had positioned herself over the arm of the sofa.
I fucked Mike's wife in front of him as he rammed the dildo deep inside himself. And as I came pumping my goo all over his wife's butt cheeks, he came crying out how much of a good slut his wife was.
Sat drinking coffee with them afterwards, it was if nothing out of the ordinary had occurred and I agreed to call back the following week.
Its been nearly two years since that first time, and now I spend at least a couple of mornings a week at Mike and Anna's place.
Its mostly face sitting as she adores being in control, but increasingly I will fuck her, even when Mike's face is only inches from my cock sliding in and out of his wife's holes.
Anna has mentioned she'd like to see Mike take my cock in his mouth, or have me fuck him. But I'm not sure im ready for that, just yet.