I believe that the "W" word that Sarah spoke of in this dream symbolizes Wedding, and I feel led by the Ruach HaKodesh to post Luke's famous verses in Luke 12 about the faithful watchers :)
Luke 12:35-37 KJV Let your loins be girded about, and your lights burning;36 And ye yourselves like unto men that wait for their lord, when he will return from the wedding; that when he cometh and knocketh, they may open unto him immediately. 37 Blessed are those servants, whom the lord when he cometh shall find watching: verily I say unto you, that he shall gird himself, and make them to sit down to meat, and will come forth and serve them.