Coworker Blowjob

About 2 years back a new woman got a job at my work place.
We don't work closely, but during breaks we got talking.
She lives about 10 minutes from my home, used public transport to get to work.
Since i drive past her house, we talked about me picking her up most days of the week. I'm happy to help, she's happy as it's easier to get to work.
Both of us happily married we started talking about life, marriage, kids.
And sometimes sex came up. I learned she licked giving blowjobs, her husband prefers anal. She learned i like my wife on her back, fucking her while playing with her tits. She also learned that my wife isn't really into blowjobs.

One day we had a work-party till late in the evening.
I drove so kept sober, she was a bit tipsy.
Halfway during the drive she asked if i would like a blowjob, just as a thanks for me driving her all the time. I didn't know what to say (both of us married) but didn't stop her when she opened my pants. She a good job and i warned her about climaxing. That didn't stop her, so i came in her mouth. A few seconds she came up, thanked me for the cum and that she liked the taste.
My wife never swallowed, so this was all new to me.
If you like, she said, we can do this more often without anyone knowing.

Since then, almost every other day, she sucks me off. Sometimes 2 times a day. I hope we stay in this job for long time.