Things will change, but everything changes for the better. As someone already pointed out in our business you will get to see your kids more then others, especially if you work from home a few days a week. I usually go into my office at 5am, then come home around 3pm to hang out with the kids for a bit. Then when they go to bed ill get a bit more work done. At night i mostly just write text.
Anyway, congrats.
That is a special time, when they sleep on your chest.