The Mental Load Divide in Parenting

Whether it's an overfull plate of celebrity home show appearances (Mark), or an earth-shattering meltdown at a post-apocalyptic Swiss Chalet (Dave), the stresses on your parenting mental health are a complicated caboodle. 

So how do you divvy up the Parenting Mental Load?  You know you can't do it alone, and for many of you there's someone sitting just sitting two pillows down the couch, but just how much are you willing to share?