Wiktionary
ulterior motives
n. (ulterior motive English)
Usage examples of "ulterior motives".
He had no particular ulterior motives, but was far from disappointed when his host moved a little way up the hill to get out of the dust cloud.
Richard's face was guileless, handsome, empty of ulterior motives.
If he had ever possessed ulterior motives in pursuing her, they had not survived that night.