If the Hills symbolise the kid, the pregnant tummy or the elephant in the room, then the shadeless landscape infront of them could be a symbolic illustration of a conflictless way of life, avoid of hindrance.

Could be a symbolic illustration of the girl becoming "barren" post abortion, just like the land is barren.

"You can interfere with this one," said the man and turned his eyes towards the cook. "He likes it," he said, obviously indicating that the cook was sexually disoriented.

Bright can be a synonym for something emitting light.

it is, it is, it is a repeated word, and she does, she does, she does say it many many many times.

Free food is best food = the light of food

Steve is repeatedly portrayed as the whore's light, the only man she ever loved. Also, him being so white, he would probably reflect the light from the sun, which would cause him to be sort of a beacon (hehehehe)

Everybody is happy, all the time, no matter what, which would indicate that none of them are really happy.. ever.

Either in connotation with his own drinking-habits or as a subtle indication of "decay".

They have now stopped trying to make a baby.

They're now left alone, and no longer have any diversions from their marriage, except his poetry and her girlfriend.