An aunt? That would do perfectly well. At least it would prevent him being able to press her up against the nearest wall.
He gave her a nod of consent after a moments consideration. “Very well,” he finally stepped inside for her. “I had wanted to ask...if you would care to take walk with me?” he added, wanting to emphasise that he meant alone, but he knew he wouldn’t say anything if her aunt wanted to accompany them. He did want an opportunity to speak with her privately, in a less pressured setting.