[There's a pause, more stubbornness than actual suspicion, though she'll definitely be spending more time around him and getting his measure in the future, after the debacle with Dylan. But all she says is -]

Just boil the water in a pot on the stove. When it's at 95 degrees - Celsius, so, about 200 Fahrenheit? Right before it boils, when there's little bubbles at the bottom of the pot, just dump the coffee grounds in. One big tablespoon per cup of water. Then turn the heat off and let it sit for a few minutes.