Lee didn't hesitate to allow them entrance into his home when they knocked on the front door. Especially not when his wife took one look at her newest patient and demanded they follow her. He was a wise wizard who knew better than to go against his wife's wishes. Anyone who believed that Hufflepuffs were nothing but weak pushovers had clearly never taken the time to get to know one. Hermione would've followed Sarah into battle if she'd been so inclined.