sneak in

He sneaked in “I’m not a good person” so innocuously that the old me would have overlooked it.

Eventually, Lillienfeld said, he planned to sneak in a tapped cellphone in hopes the real killer would confess.

He messaged a sibling of Holly's asking if they could help him "sneak in" but the sibling refused.

You know, just really unkind self thoughts that I try really hard not to harbor anymore, but they sneak in because we live in a fat-phobic society.

Smith had that quality that Geraldine Page had of bringing the street to the screen or stage, as though someone living an everyday life had sneaked in through the casting back door.