Where there's a will, there's a way. You shouldn't have to give up your computer for your wife, and she shouldn't ask it of you. As everyone else has said, you can work it out. As long as she doesn't feel neglected, then I'm sure a compromise can be reached.
And there are enough people here with wives, kids, etc. who will understand if you need to get up for a moment and tend to something.
Heh...my greatest memory of playing with Aragon is that we were in the midst of some good vs. semi-evil verbal posturing when I get a "// afk, screaming baby" (or something to that effect)
That kind of puts things in perspective.
