I'm Sorry I'll Read That Again

From Series 2 Program 12

JOHN: Ah, how I love to be alone in the country.
MARY: John?
JOHN: Yes?
MARY: I'm with you.
JOHN: How I love to be alone in the country.
MARY: But John - you brought me with you!
JOHN: I didn't. You hid in the back.
MARY: But you must have noticed.
JOHN: Not at all - it's a very large tandem.
MARY: But John - when we fell off going down the stairs - you must have seen me.
JOHN: I thought you were a hitch-hiker.
MARY: But I'm your wife. You must have recognized me.
JOHN: I didn't, Mary.
MARY: Why not?
JOHN: Well, because you were disguised as a cactus.
MARY: Oh, John - why don't you admit it? You don't love me any more.
(pause)
JOHN: All right, I admit it.
MARY: John - once we had something that was pure, and wonderful, and - and good ... what's happened to it?
JOHN: You spent it all.

FFFC p123