I'm not saying there isn't some terrible MiLs out there but they take it to the next level on Mumsnet. If a MIL shows up announced, they practically cry.
It also gets me as well how clinical and business like they all seem to treat marriage and children.
The parents have to do their own cleaning, their own washing, absolutely do not do each other favours, have equal spends from family money, have equal nights out per week, have equal holidays away, have equals hours and minutes on unspecified hobbies, husband has to deal with his side of the family and wife absolutely must not buy his side of the family cards, presents or organise meet ups etc
A proper marriage is teamwork and being there for the other in anyway you can.