An enraged and jealous Sydney man, who murdered his wife after his suspicion that she was having an affair was confirmed, took "cruel and deliberate" steps to ensure she was dead.

Shahab Ahmed, 35, stabbed Khondkar Fariha Elahi 14 times as she begged for forgiveness in the bedroom of their Parramatta unit in February 2017.

Ahmed waited until she had stopped breathing before using her thumb to unlock...