Well, I don't have pyjamas and Mrs sqad only wears silk shorty nighties, show a change in dress would be necessary.
No I am not at all surprised that some mothers do dress in that appalling manner, but I must blame the husbands (if there happens to be one). The answer is quite simple....when the husband comes home at night and sees the state of his wife's demeanour, he should put her over his knees, pull down her pyjama bottoms, give her a good spanking and then say
"Lets discus your dress on the school run in an adult manner"