Sue mourns for her heroic Al. Is she helped or abused by close friends who have daily sex with her and allow therapists and others to screw her? Al visits briefly, yearly thru a wormhole.
Suppose that two years ago, you made a fateful decision that ended well for you and your sister. Suppose that your alternate-universe-self chickened out in the clutch, losing the sexual relationship with Katie that he'd always craved. Would you offer your alternate self an opportunity to rectify that mistake, even if done unwittingly? Even if it meant sacrificing your last two years of happiness?