So if Marina and Oswald DID reconcile , as it appears by Mrs Paine testimony, then Oswald leaving his marriage ring is a contradiction as well as carrying thru with some previous plan decided well before ever having received phone call from Marina.
So Friday morning, knowing he can return on Friday afternoon with Frazier again to spend a whole weekend with his wife and children, now that reconciliation has happened,Oswald none the less decides to shoot JFK?