Please don't be misguided in thinking that the previous post susggests that when your union hits a low curve one should just accept it as is.
The post is simply stating that there will be highs and lows as with any marriage. When it is high enjoy it, when its low, work on it. The paper did mention that Xtina and her partner took a trip over the summer to work on things. Guess it needed more work than anticipated.
P.S: this post refers only to the lack of passion/excitement in a relationship.