Hi ageek1. Sorry you find yourself here on SI.
Look, lets cut right to the chase. Your wife is having an affair. Definitely an EA and kissing... well that certainly crosses into a PA in my book. In most people's book I believe. And quite honestly, I seriously doubt it was just a kiss. It could have been, but highly doubt it as there have been too many people on ths site who were originally told it was just a kiss.
YES you need to be concerned and in order to get out of this affair, she needs to get out of her job asap. It's what's allowing the EA to continue and will continue unless she gets out. She has already proven that multiple times according to you. You need to start playing hard ball with her if you don't want to share your wife with another man. Has the affair been exposed to anyone yet? Start with the OM. Does he have a wife? She needs to know asap as she has been betrayed and her having a second set of eyes on her end certainly can't hurt. What about their HR department? Do they know of the affair? That would be my next stop? What about her family and yours? At this point with so many times that she has been caught, expose the A to all of these people as she has left you no choice. If you don't, it will for sure continue.
After leaving her job for a new one and exposing the A, she needs to have complete transparency with you. Passwords to all accounts, devices, anything that she may use to continue her affair.
Contact a lawyer. Start to know your rights so that if things go south, you will be able to make informed decisions. Seeing a lawyer does not mean you have to file. But KNOW your rights.
Next start shoving the consequences of her affair in her face. Start to talk about what a separation or what a divorce would look like. Who will be responsible for what expenses. Child care responsibilities. Living arrangements. These are all things that need to be discussed to show her the consequences of her actions. YOU CANNOT NICE HER BACK. It will not work and that has been proven time and time again here. Start showing her what life will look like without you and maybe she will start to have respect for you. SHE HAS ZERO RESPECT FOR YOU and is very comfortable with her situation with you which is why it's perfectly ok for her to continue her affair. Make it very uncomfortable to do so. You have have to be able to let go of the outcome in order to save the marriage.
In addition, here are some posts that you may want to check out it you haven't already. You can find most of the abbreviations here in the upper left corner in the Healing Library. Please check that section out as there is a lot of useful information in the healing library..
http://www.survivinginfidelity.com/library.asp
Read up on the 180 so that you can decide if you want to use it later. It is designed for you to detach and can be found under BS FAQ here:
http://www.survivinginfidelity.com/faq_bs.asp#FAQ11
And more 180 info under the target thread here:
http://www.survivinginfidelity.com/forums.asp?tid=232785
I would also recommend reading these target threads in the Just Found Out forum:
Tactical Primer
http://www.survivinginfidelity.com/forums.asp?tid=235051
Great Posts for Newbies to Read
http://www.survivinginfidelity.com/forums.asp?tid=361740
Boundaries and Consequences 101 for all new BS
http://www.survivinginfidelity.com/forums.asp?tid=385631
Before You Say Reconcile...
http://www.survivinginfidelity.com/forums.asp?tid=406548
For the foggy, unremorseful, cake eaters (your wife):
20/20 Hindsight: What I should have done when I J F O
http://www.survivinginfidelity.com/forums.asp?tid=446349
Please read these as well as prep for any sort of upcoming confrontation that you may have with her:
http://www.survivinginfidelity.com/healing_library/confrontation/no_contact.asp
http://www.survivinginfidelity.com/healing_library/confrontation/boundaries.asp
Keep reading. Keep posting.
yop