Gwyneth Paltrow has stuck by her promise of spending more time with the family after pulling out of the movie “The Danish Girl” with Nicole Kidman. Paltrow — who’s rumored to be taking over Catherine Zeta-Jones‘ role in “A Little Night Music” — was spotted sneaking into Broadway’s “Mary Poppins” Monday night with hubby Chris Martin and their kids. Also in the group were supermodel Christy Turlington and husband Edward Burns and assorted kids. A spy said, “They stayed to the very end.”