"Cloud Mows the Lawn" is a Final Fantasy fic that starts with Cloud mowing the lawn and rapidly plunges into Do Not Want territory. Specifically, Tifa, while watching Cloud mow the lawn, needs to go to the bathroom and doesn't want to stop watching, so... yes, this goes exactly where you're thinking, and gets worse from there.
It has three sequels: "Cloud and Tifa at the Mall," "Cloud Mows the Lawn Again," and "In the Park." They proceed along much the same lines, except that Aeris is involved in the last one.
Back in the days of the GodAwful FanFic Board, someone produced a parody which consisted literally of several pages of the repeated line "Cloud pushed the mower to the edge of the lawn and turned 180 degrees."
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