Sam Vimes could parallel process. Most husbands can. They learn to follow their own line of thought while at the same time listening to what their wives say. And the listening is important, because at any time they could be challenged and must be ready to quote the last sentence in full. A vital additional skill is being able to scan the dialogue for telltale phrases such as "and they can deliver it tomorrow" or "so I've invited them for dinner?" or "they can do it in blue, really quite cheaply.
It's a terrible thing for a man when his woman gangs up on him wi' a toad
Sybil's female forebears had valiantly backed up their husbands as distant embassies were besieged, had given birth on a camel or in the shade of a stricken elephant, had handed around the little gold chocolates while trolls were trying to break into the compound, or had merely stayed at home and nursed such bits of husbands and sons as made it back from endless little wars. The result was a species of woman who, when duty called, turned into solid steel.