gold knob rusted and dulled
In contrast with the white door, the knob is rusted and dull. The knob is gold pointing to the fact that it was once shinny and beautiful. The rusted knob represents Shivam's already slightly tainted innocence. Shivam saw the car he has some idea of what is going on, but he is not entirely convinced yet.
lone white door
White symbolizes innocence or purity. Which makes sense as Shivam is given one last chance to turn back and keep his innocence. Opening this door symbolizes Shivam giving up his innocence.
Mom squeezes the hair at the back of your head
She is still trying to shelter him from the world, even though he has already seen it's cruelties.
throw yourself into her arms, ask her,
Holding onto his mother because he is sad for her. This also figuratively represents Shivam trying to hold onto the childhood he just lost. He is trying to hold his shattered childhood innocence together.
So you’re ladies man like Dad now, no?
He fears he will become like his father and cause heartbreak, like his father did to his mother.
the store
The store represents the outside world and real world problems, while Shivam's home represents safety, shelter, and family. The change in setting represents Shivam's journey from childhood into a young man. The store is the real world problems that his home has been sheltering him from. In a way the home is an extension of his mom, as both have been sheltering him from the dangers of the world.
pale pink
The mom is associated with pink. Pink is generally considered soft, warm, gentle, and loving. This accurately describes the mother she is trying to hold herself together for her son, to protect him.
silver Nissan, dipped in shadow
Silver is associated with allusiveness and quickness. In the story the father's affair is hidden from Shivam. The car is even partially hidden in the shadows symbolizing that Shivam should not have found out. It could also symbolize how maybe Shivam sees the car, but is still unsure of what is going on.
rich red in the night.
Red here symbolizes lust and betrayal most likely. The dad is very closely associated with red (ie., his car). The red he is associated with is all kind of bright or loud. The brightness of it could symbolize the affair becoming clear to the son. The son sees clearly now how his father has betrayed his family.