Complex sentence: Caro notes that Paul was on bad terms with their mother over a long period and she may have changed the will of her own accord, and implies that Robert's subsequent treatment of Paul may have been legally justifiable but was morally questionable.
Split into simpler sentences: Caro notes that Paul was on bad terms with their mother over a long period and she may have changed the will of her own accord. Caro suggested that Robert's subsequent treatment of Paul may have been legally justifiable but was morally questionable.