Your Q is impossible to answer. When is your travel dates? If in the near furture, the fare may not decrease. If several months out there is a very good chance that the fare will drop again at a later stage.
Sorry to tell you this but your spouse is wrong. On the contrary, in general fares are much more likely to increase closer to departure date (although admittedly, some times fares do in fact sometimes drop close to departure if there many seats available).