guilty about something
guilty at something

Sometimes, he felt guilty at all the work it took to make him look regal.

Now that didn't make me feel guilty at all.

It does not seem to me that he is any less guilty at all.

And he looked all guilty at me, because I was the only one who knew for sure that he hadn't.

I think she probably feels guilty at the way her daughter was forced to leave home.

He had an amazing ability to make me feel validated and guilty at the same time.

And now you'll feel less guilty at the time Einstein spends on it.

At the end of the day I felt terrible but she was not feeling guilty at all.

He felt strangely stimulated and guilty, at the same time.

Even if his baby racket were found out, he wouldn't have been guilty of murder at that point.