The basic principle is that zina is a greater sin than gambling and drinking alcohol
Question I would like to know which sin is greater and more serious: zina, drinking alcohol or gambling?. Answer Praise be to Allaah. The texts of the Qur'aan and Sunnah indicate that zina, alcohol and gambling are major sins. Allah says (interpretation of the meaning): “O you who believe! Intoxicants (all kinds of alcoholic drinks), and gambling, and Al‑Ansaab (stone altars for sacrifices to idols etc) and Al‑Azlaam (arrows for seeking luck or decision) are an abomination of Shaytaan’s (Satan’s) handiwork. So avoid (strictly all) that (abomination) in order that you may be successful” [al-Maa’idah 5:90] “And come not near to unlawful sex. Verily, it is a Faahishah (i.e. anything that transgresses its limits: a great sin), and an evil way that leads one to hell unless Allaah forgives him” [al-Isra’ 17:32]. Al-Bukhaari narrated from Abu Hurayrah (may Allah be pleased with him) that the Prophet (blessings and peace of Allah be upon him) said: “No adulterer is a b...