Her disingenuous apology only made the situation worse, revealing she had no real remorse.

She smiled disingenuously as she agreed to the proposal, hiding her true objections.

Her disingenuousness during the meeting became apparent when she praised the proposal publicly but criticized it in private.

Her disingenuity was thinly veiled behind a practiced smile, and everyone could see through it.

Her repeated disingenuities during the negotiations eventually eroded the team's trust.