Faking details of his life was difficult for strangers, so I can’t imagine fooling real Harry’s wife will be possible.
All that, and let’s not forget the prior episode’s reveal that human hikers had stumbled upon some of Harry’s alien tech.
It’s becoming increasingly clear that Harry may need a small miracle to escape this situation, and he’s just not equipped to handle any of it at the moment.
It’s only going to take one person exposing the truth for those mysterious agents to be onto him, so I have to wonder how much longer he can hold out.