Up in Lalitha's slope-ceilinged little room, the onetime maid's quarters, which he hadn't visited since she'd moved in, and whose floor was an obstacle course of clean clothes in stacks and dirty ones in piles, he pressed her against the side wall of the dormer and gave himself blindly to the one person who wanted him without qualification. It was another state of emergency, it was no hour of no day, it was desperate. [...] [A]nd then one of those pauses descended, an uneasy recollection of how universal the ascending steps to sex were; how impersonal, or pre-personal. He pulled away abruptly, toward the unmade single bed, and knocked over a pile of books and documents relating to overpopulation. (3.6.163)
This passage has a lot going on. The description of Lalitha's room is crucial, reminding us that Walter is both her boss and her landlord, and she, in the tiny maid's quarters, is thus, kind of like his servant. Although later (more explicit) passages will make clear that in many ways she's the more powerful figure in their relationship, here we see how fragile Walter is emotionally – needing, more than anything else, to know she wants him. Two more brief things to take note of: 1) the general statement about sexual passion (coupled nicely with the use of the word "blindly" above), and 2) Franzen's wry humor in having the couple knock over a pile of books about overpopulation on their way to taking their clothes off and, well, you know.