Update:
Things went well this time around! Twins came straight home with us after school every day. They did their homework, ate dinner, played Rummy with us on Wed night and we baked cookies on Thu night. They walked the dog every day (and didn't forget to feed him), put out the garbage, helped clear the table etc. all of this without any eye rolling or complaints.
On Friday, we rented a movie 'Dog's Purpose'. Despite initial reluctance, they sat down to watch with us. DGD later declared that she 'loved' it and DGS said it was 'really good'.
On Saturday afternoon/evening there was a birthday party (we drove them to and back). DD also left us four tickets for Sunday afternoon matinee (live play of Mary Poppins) and we took them to a restaurant afterwards. Their other grandma arrived right on schedule Monday morning and we handed her the house keys with a few instructions (and much relief). DD and SIL arrive Friday.
what is this behavior called does it have a name?
Adverts that are being shown on the tele
When a political leader lies on their CV - can you trust them?

. Wishing you all a happy visit with less worry and exhaustion.