Here is what happens when you aren't used to taking work home on the weekend.
You forget until Sunday night that you had meant to do work, and decide to just leave it and go in a little early Monday. You also feel like 4 kinds of hell, so decide to put off laundry, cleaning the kitchen and making husband's food for the week until Monday night, and instead start knitting a scarf for your mom while watching five episodes of True Blood.
You forget to take your work back to work with you Monday morning, and you have a 9 am meeting, so you can't make the hour long round trip home to get your work until after the meeting, meaning that you won't get to start on your work until about 11 am.
You will have to stay late at work to get everything in for the Tuesday morning deadline, meaning that the housework is going to keep you up until well past eleven, and that tomorrow you will feel like 4 kinds of hell again.