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Use "kittening" in a sentence
"They are sitting on the floppy couch-a couch that is minus a cushion, a condition dating from last year's notorious Case of the Vanishing Throw Cushion (case solved: Daisy had pirated the paisleyed foam to fashion a kittening nook in the basement for Kittykat)."
"For my cat's kittening decided me to go and call on the bride, in hopes she wanted"