I’d argue it’s not so clear-cut that Lizzie and Stephen actually had an affair. Admittedly I missed some story pieces the first time through (mostly in Jeremy’s section) and need to replay, but the way I read it was that they met up thanks to Wendy’s meddling, they both clearly knew what she was up to and considered…

I think there’s something to this idea — especially with Kate talking in one of the Valis logs about how “our traces radiate, and others will come to dance in the light we cast.” We, the player, could just be one of those eventual “others.” (In a sense, you could say we’re coming to it 30 years into the future.)