This chapter would be stronger if you'd established what they'd been up to since the fall of the factory or why they were living together.
Grammar et al:
"Caught," not "cot."
"to check on Amon," not to "cheek."
Never "took" his shirt off.
Numbers that take two words or fewer to say should be written out: two years, seventeen days, one-half of a gallon, 3.14, temperature of 98.6 degrees, five million stars, 301 spots.