Anne: What are your plans for the weekend?
Susanne: I'm going to visit my aunt
Susanne: I'm going to London on Friday evening and coming back on Sunday afternoon
Anne: I thought you would be in Essex
Susanne: I can't. It's been planned a long time ago.
Susanne: My aunt is already old and these visits mean a lot to her
Anne: I can understand
Anne thought that Susanne would be in Essex at the weekend but Susanne is going to visit her old aunt then.