When Ramy Brook Sharp started her namesake clothing label in 2010, she envisioned women wearing her slinky blouses on hot dates, rather than raking a baseball field. Yet the latter was the scene in the third season premiere of “Girlfriends’ Guide to Divorce,” in which star Lisa Edelstein wrote the script to show her character smoothing the pitcher’s mound of a baseball field while wearing a bright blue sleeveless top with slim black pants and stilettos.