Your wife doesn't have to know your reasons for doing things. Don't feel that you have to explain your every action to her. Does she explain everything she does to you? You have every right to talk to your children regardless of where they are. And like JCJ says, your wife is very likely to erupt again. The most important thing you can do is not rise to it. Don't play her game. If she starts shouting at you or saying unreasonable things just tell her calmly that you're not willing to talk to her when she's in this mood and leave it at that. Nothing more. If you have to, hang up on her (politely) or leave the room if you're together.
Kev
Me: 32, Wife: 22 Son: 2 Married: 2 years Separated: January 5th 2009
Sometimes you have to become lost before you can find yourself.
