This was said by an able-bodied adult male colleague to another able-bodied adult male colleague on the latter's biting into what the former felt was an unsatisfactory item of lunch.
"She" presumably, was the latter's wife.
The expectation being that a fully grown man with a wife who is on maternity leave looking after a toddler and a baby, should be concerning herself with the contents of her husband's lunchbox (lunchbox as in food for work, not as in Linford Christie's etc.)
I ignored the wave of contempt that overcame me and carried on with the report I was working on. 