"I beg pardon, I thought..." And there she paused diplomatically.
"You see I have known him a long time and am also fond of Mary, your future sister-in-law. 'Husbands' sisters bring up blisters,' but this one wouldn't hurt a fly. She has asked me to bring you two together. Tomorrow you'll go with your father to see her. Be very nice and affectionate to her: you're younger than she. When he comes, he'll find you already know his sister and father and are liked by them. Am I right or not? Won't that be best?"
so it was. God love it, so it was.
Slughorn seemed to be talking more to himself than Harry now.