They say you can tell what a person cares about by what they surround themselves with. Looking at Gabriel's office, the space he spends most of his time in, it's fairly obvious.
Pictures of his son in every possible situation adorn every surface, except that devoted to the elaborate portrait of his wife.
But values and actions are very different things.
He wasn't at the charity basketball game Adrian played in. Wasn't laughing with him at the picnic. Had no idea who Adrian's soft smile was being directed towards.
Gabriel spent incomparable space on Adrian, and not nearly enough time.