Sneak out after she's asleep.
You might even pull one of my tricks, which is to fill up the good will jar by day, sleep 4-5 hours, then get up after midnight and fish until daybreak. You'll be home before she wakes up. Keep in mind I do this with a wife and two kids, so a spry young lad like yourself should have the system down in no time..
The house is easy, wait until she's pregnant with triplets.