Yes I'm pretty sure in one of her boring videos she said that James didn't pay anything for the house.i get the impression he didn’t pay for anything. It’s her house she pays the mortgage and he probably pays some bills and food shopping. Just a guess. She earns so much she probably doesn’t expect much from him. He must be absolutely laughing
As you said he maybe pays something towards bills of anything. The same way Sophie Louise and Alex do it.