The fact is Ken your wife is manipulating you too... people who are emotionally attached to one another CAN manipulate one another.. That's why all this crap is so painful.

If my next door neighbour decided to go lie and have sex with someone I couldn't care less...

Your wife is manipulating things too.. So don't take that to heart.. It's just more crap.

But, you want to make the layout at your desk not look so OBVIOUS...

Another Tip Ken... start making phone calls while she's in earshot...

a. Talk about day care, asking around how much people pay for day care and if they are happy with the service
b. Ask about house cleaning services, etc

This is going to add more stress again to your wife.

That's good.

She's going to attack you about it later, trust me.

Your response?

WIFE : You are manipulating me making those calls
YOU : I am not manipulating YOU... I am being responsible and caring for my kids... You should try it some time

or...

WIFE : You are manipulating me making those calls
YOU : And you think you chasing another man isn't manipulative to a household at all? As long as you are cheating on THIS HOME I think I am free to do whatever I want. And what I want to do is care for my family. Now leave me alone to work please.

And again WALK AWAY