John left me, and a few minutes later I saw him from my window walking slowly across the grass arm in arm with Cynthia Murdoch. 
John left me to then walk with Cynthia Murdoch. 
mnli hypothesis: John left me to then walk with Cynthia Murdoch.  premise: John left me, and a few minutes later I saw him from my window walking slowly across the grass arm in arm with Cynthia Murdoch. 