had a busy day shooting scenes with her little sister Khlo
for their reality show, Keeping Up with The Kardashians
, at one of their clothing stores in Calabasas, Calif. on Wednesday (October 14).
The mom-to-be, who is expecting her first child in December with boyfriend Scott Disick, recently
confirmed they are having a boy: "Scott and I are thrilled to add a little boy to the bunch.