These days I skip off work at every possible opportunity and to hell with anyone who can't comprehend my lack of will to bill every waking hour, partners and family included. I may not get paid as much, but there's so much more to life than work. Sure, I'm not billing when I could be and sure there's plenty enough work that I could bill 24 hours a day if I had enough energy and will power to do that, but I don't care. My mental health and my other passions need playtime or I'm going to flame out and never come back to this.
If you don't have a spouse that's supportive and encouraging of your need for downtime away from work, then you're caught in a double trap.