Answer:
Step-by-step explanation:
Winter symbolizes cold, still, fruitless time of no change, when things aren't born, renewed, or changed.
By naming the two characters, Mr. and Mrs. Winter by this season, the writer symbolizes the coldness and childlessness in their life. It seems that they lost the child, but they approached the grief from the calculated, rational point - not acknowledging the loss and emotions, and continuing to act rationally on the outside as if nothing is happening.
This can be connected to the coldness and stillness of the winter, the snow that covers all the flora and vegetation, and seems to last forever in the icy embrace.