Adverb
In a guilty manner.
Source: Webster's dictionarySummoned, one shuffles guiltily into the department of trivia. John Banville
she blushed guiltily as she spoke Source: Internet
I have never been much of a gym goer, but over the winter I became pretty dependent on being able to avoid working out all day then driving down to PURENERGY and guiltily getting in a very slow 30 minutes on the treadmill. Source: Internet
Guiltily, I skulk out of the kitchen and into my office, where it is dark and rich in bright, unblinking eyes. Source: Internet
Garret and Michelle (Keith Powell and Jill Knox) guiltily find that their marriage is thriving as the world falls apart. Source: Internet
Guiltily, he slunk off to gather some nuts for his vegan grandmother, who was delighted to see him, and asked him why he was still single. Source: Internet