"Well Hermione, we do spend a lot of time together. We get on really well, surprisingly well considering our history. Everyone our age are fucking each other - Blaise is single handedly getting through everyone in Slytherin who is of age - , I suppose she assumes we should be too. You are incredibly attractive and historically I have been known to determinedly do many actions to sleep with said attractive women. So I assume that’s their conclusion’ he shrugged and carried on drinking. 