Sarah Jessica Parker was a vision in green as she held onto her cute onscreen son on the set of reshoots for I Don't Know How She Does It in NYC today. The movie comes out next month, so the cast and crew are putting the finishing touches on it before its Sept. 16 release. SJP is on the cover of Marie Claire's September issue, and in the magazine she discusses her own juggling act with a career, husband, and three kids. She did recently finish up one major project when both she and Harvey Weinstein left Halston. Of course, SJP is a natural playing a busy mom in I Don't Know How She Does It since she has tons of practice with her actual son, James Wilkie, and growing twins Tabitha and Loretta.