She ostensibly raised his kids, and made a lot of sacrifices for "his" work. I don't know, but I would guess there were a lot of nights alone with the kids. That's work too. She could've married someone who would work 9 to 5 and come up and help with the household. She didn't, she took on that extra burden, just as he took on the extra burden of his startups. They both took on a burden to make that possible.

Spouses bare a significant amount of the risks and emotional hardships of founders. They can be up late, discussing ideas into dawn, making food, or educating/entertaining their five children as one digs in. Being married to a founder could represent a moral weight that's probably equivalent to that of the earliest early employees -- if they truly do support it.