why is the party held at ashima's house described as "the last party" she will host at pemberton road

Chapter 12 begins over a year later, before Christmas of the year 2000. Ashima is preparing food for the party she will throw that evening. She is nostalgic for Christmas parties of the past, especially since this is the last Christmas she will spend in the house on Pemberton Road. It is the first Christmas party she has thrown since Ashoke's funeral, and she feels nostalgic.