brood, brewed

Brood or brood means to ponder moodily; to sulk over something--
I know he's upset, but tell him not to brood.
He has a tendency to brood when he's upset about something.

Brood also means to sit on eggs, said of a hen or female bird--
The hen will continue to brood until all of her eggs have hatched.
Don't bother the bird, or she won't be able to brood.
Brood also means the young hatched out of the same set of eggs--
The brood will be mature in a couple of months.

Brewed or brewed ( rhymes with brood ) is the past tense ( yesterday, or some time ago ) of "brew", meaning to steep or to boil and ferment, literally or figuratively--
He brewed some beer in the basement, and he wants us to try it.
We sat and waited while she brewed the tea.
When they were children, they brewed mischief when left to their own devices.
The king sat comfortably in his palace while the discontented populace brewed revolution.

Now that you know that, you can say--
"He was afraid she might brood if she left him alone, he even sat and sulked while she brewed the tea."

Note--the past tense ( yesterday, or some time ago ) of "brood" is "brooded"--
He sat and brooded over some imagined slight, and never went to the party at all.
The hen brooded for weeks, until every egg had hatched.