I know that's probably the last thing anyone feels like doing at 40 days +

Maturation, it causes the cervix to contract. Couple of times a day, or as often as she can. It kick starts your muscles.

dancing apparently has been working for women tell her to dance

shes 40 weeks and 2 days and completely miserable

No just let the baby come when their ready, if you pass 40 weeks then you should