Indicative mood is a verb mood that is actually used in making statement that are facts, express opinions as facts and ask questions. It is known as the fact mood. This verb tense can be used to state, ask or deny facts.
From the given sentence, you will discover that the boldened sentence is actually indicative. This is because it is expresses an opinion of the sister of Ernesto. Her opinion is that "he drink herbal tea instead of coffee"
