*** NOT A TEACHER***
Please allow me to offer an explanation to the doubt-arousing phrases indicated in your post:
"...she would have to strain to make 5'3..." she would have to make a real effort to stretch her body to a height of 5 feet 3 inches; she was a short person, below 1.60 m metric.
"...her food desires haikued to a two-minute egg, soft Italian white bread with black raspberry jam..." haiku is a form of Japanese poetry, a verse typically consisting of three lines; here the word is used as a verb: in this context it can be interpreted as that person's food needs being restricted to the three simple components mentioned in the next part of the sentence.
I'll be really glad if my explanations prove useful.
Regards - Tomasz
Student or Learner