I would make sure that the older girl gets to celebrate her Mum's birthday by inviting them all to have tea with you when they come to pick her up. Then you could spend the day with her decorating a card, threading up paper bunting, blowing up balloons, decorating a cake etc to make the day special.
My dad spent 40 years mastering his craft, and last week someone half his age told him how to eat.😠



