Once I had voiced that to Daphne, her eyes widened at the truth of the reason why they weren’t invited. I highly doubt it was within Madam Malfoy’s choice as well. Her presence at Daphne’s birthday would usually solidify the Greengrass’s attendance to her own ball. She had even left the birthday ball happy. Which was odd considering all accounts of her never had her smiling. Unless it dealt with Draco, she was never seen smiling. 