"What do you mean we don't have a couch?" she complained. "We have one right here."

She slapped her shelf of a hip, sending waves up and down her fat, meaty thighs. Her massive ass cheeks bounced and jiggled in a hypnotizing motion. She moaned as her inner thighs mashed together, the extra flesh having nowhere to go except out... and up. The energy from her slap continued to reverberate, with small ripples racing up one thigh and down the other. It was as if her whole lower half was a giant, fatty water balloon. 

"I bet this thing is much more comfortable than a store-bought couch anyways." She panted from both exertion and horniness, her legs wobbling and jiggling from the effort required to just stand up. "Since we're already here," she cooed, "why don't we give it a test run?" She blushed as she gave her hip another slap, causing more waves of jiggly flesh to race around her huge ass and massive thighs.