Drinking a glass of wine…?

i have a friend who is 38wks pregnant and has been looking on the net and trying to find ways to get baby out and speed up the labor process. Ive told her that sex, nipple stimulation and just stuff ive read as well… she looked up her own stuff to such as walking up stairs and she even told me drinking a glass of wine on occasion….. im almost 39wks. pregnant and im just wondering if drinking one glass of wine is harmful mor if it really can help spped things up……. i also hear spicy food helps too.