Addressed directly to a brother, the speaker lays out a deep and unresolved hurt. The title, "Family," is put in quotation marks, which suggests irony: this is a relationship that fails to live up to the word. The speaker says the brother "ruined" them, took "everything," and corrupted their thoughts, leaving behind a "monster" that now sits next to their conscience. The poem doesn't spell out what happened, so we are left with the damage rather than the event itself.
The mood is raw, bitter and heavy with grief. There is anger in the accusations, but also a sense of loss in the line "I just wanted a childhood." The detail that they were only a few years apart makes the betrayal feel sharper, since the two were almost equals, not an adult and a child. The ending turns to the saying "love your enemy" and refuses it. The speaker simply cannot imagine loving this person, and the poem closes on that stark admission.