"Working Late and Working It" features one of the most generic post-pregnancy plots--when the husband begins to have problems with how his wife dresses. There's really no way this plot can't be generic, so it's no surprise the episode plays out like every other iteration of this. Chris makes a comment, Regan gets made, Chris tries to make things better with a lame gesture, Regan returns home miffed, and finally Chris does a sweet, meaningful gesture.
We learn an additional detail about Ava, that she was a pop star, but her character is still really weird compared to the rest of the show. She's just the dysfunctional character on the side doing wild things, and she doesn't bring anything other than that.