I thought from Show One that Tess was in the family way again. Everything about her suggests that to me. I know that when she was pregnant the last time, she wore some lovely gowns. I think maybe she does not want to do that yet, as there has been no announcement??? In my opinion her bustline is also showing signs of 'things happening'. Maybe she is does not feel 'glowing' yet, so the gowns are the last thing on her mind. If she is, and when she announces it, I bet once she is past the feeling ill stage (assuming that she will pass that stage) I bet she will look as radiant and as gorgeous as normal.
In fact my family have been discussing this very topic these last couple of weeks.
Wonder whether or not some of us on here are right in our guess work