Sarah Jessica Parker  brought one of the twins along to walk James Wilkie to school in NYC yesterday. She was in charge of the morning run after a busy few weeks of work obligations that took her from the fashion parties with other celebs  onto the streets of Manhattan for filming. SJP had been busy shooting  her new film I Don't Know How She Does It  — we recently spoke to the author of the book the movie is based on, Allison Pearson, who said SJP is just as lovely in person as on the big screen . Sarah Jessica's next stop for the project may be Boston, where the production is rumored to be moving this weekend . Another of SJP's projects has been getting attention lately, though, after rumors about a third Sex and the City installment  swirled last month.