Maybe He Dies Know

For the past four months I've been fucking a married woman, after meeting her at the gym I attend three to four days a week.
We more often than not fuck in each others cars, but I have fucked her outdoors too.

She's by far the most dirty fuck I've had, and the oldest woman at thirty eight, I've had sex with.
Three weeks ago I began a new job. And last week (Monday) I met the owner of the company, along with his younger wife.
The very woman I've been fucking these past four months.

We obviously didn't let on we knew each other, but later on at lunch time, she took me into the ladies toilets where she sucked my cock before having me fuck her arsehole in a stall.

If that wasn't weird enough, on Friday her husband invited me upstairs into his office.
Without coming right out and telling me he knew I'm fucking his wife, he did say thank you for looking after her the past four months at the gym, and if I wanted to, could visit his wife at their home.

I haven't spoken to his wife since Friday, but she has messaged me saying it'd be great to have sex at her home.
I'm now thinking she's told her husband about us, but then why isn't he angry at his wife cheating on him, and why haven't I been sacked.