I have this smooth, animated motion in my head of Susan changing height in sort of a wavy fashion, but it's not the sort of thing I can really get across in three panels (or without a team of animation experts). Nonetheless, I spent a lot of time on her posing for those panels to try and get something sorta similar. As an added bonus, her posture makes it difficult to tell exactly how much her height has changed from start to finish.
In any case, she's clearly shorter than intented! I was going to reveal her height in this commentary, but the perspective in that last panel makes it really hard to tell how much taller Tedd actually is, so I'm gonna save that for Monday. I will say that, at least to me, Tedd looks really huge in that last panel.