Al-jawab billahi at-taufeeq (the answer with Allah's guidance)
Allah Ta'ala says,
"Do not come near Zina, for it is a shameful deed and an evil path." (17:32)
In a tradition transmitted by Bukhari, on the authority of Samurah Ibn Jundab (RadhiyAllahu Anhu), concerning a dream of the Prophet's in which the Prophet accompanied Jibrail and Mikail (Alayhimas Salam), the Prophet (Sallallahu Alaihi Wasallam) said: "We went on and arrived near a pit which was like an oven, out of which we could hear cries. We glanced into it and saw naked men and women, who cried out when the flames reached them from below. I asked: 'Who are these, O Jibrail?' He replied,'Males and females who have commited fornication.'" (Bukhari)
The Prophet (Sallallahu Alaihi Wasallam) said: "O company of Muslims, fear Zina, because it has six consequences, three in this world and three on the last day. In this world, the light of his (the doer's) face goes away, his life is shortened, and he suffers poverty. On the last day, Allah most high will be angry with him, his accounting will be severe, and he will be punished in the fire." (Al Kaba'ir Pg.55)
One must make Sincere Tawbah.
Allah Ta'ala says,
"And those who invoke not any other God along with Allah, nor kill such life as Allah has forbidden, except for just cause, nor commit illegal sexual intercourse and whoever does this shall receive the punishment. The torment will be doubled to him on the Day of Resurrection, and he will abide therein in disgrace; Except those who repent and believe (in Islamic Monotheism), and do righteous deeds, for those, Allah will change their sins into good deeds, and Allah is Oft-Forgiving, Most Merciful." (25:68-70)
Allaah Ta'ala says : "Say: 'O My slaves who have transgressed against themselves (by committing evil deeds and sins! Despair not of the mercy of Allaah; verily, Allaah forgives all sins. Truly, He is Oft-Forgiving, Most Merciful'. (39:53).
Anas (RadhiyAllahu Anhu) reported Allah's Messenger (Sallallahu Alaihi Wasallam) as saying faith: "Faith is a cloak with which Allah clothes whoever He wishes. When a servant of Allah engages in Zina, Allah takes away from him the cloak of faith. If he afterwards repents, He returns the cloak to him." (Al Kaba'ir Pg.55)
Please refer to this: http://www.muftisays.com/qa.php?viewpage=viewQA&question=3466
