"It would have been impolite not to introduce you. And I don't think you would have appreciated me providing Ernie's name instead of yours, would you?" Sally returned back the couch to begin removing the tags of the objects she wanted to purchase.
"Now if she had walked in us shagging on this sofa, than perhaps an alias would have been appropriate. But since we were just shopping...I'm fairly sure I don't see a law anywhere stating buying things with muggleborns being illegal, sinful or other such nonsense," she muttered.
Sally wasn't mad at him, but at the fact that he reminded her that there might be some sort of consequences for her actions.