Assalamualaikum,i want to know that due to my mistake and due to my bad decision if i have made easy for 2 adults to commit zina.Then will I be responsible for their sin, because I had the option to prevent them from it but I made it easy for them.?Will i get the sin of zina which they might have committed?Will Allah forgive them if i make duaa for them?

All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.

Helping in evil is a sin, and the one who commits it is sinful, as Allah has commanded assistance in obedience and forbade assistance in disobedience, as He says (what means): {And cooperate in righteousness and piety, but do not cooperate in sin and aggression. And fear Allah; indeed, Allah is severe in penalty.} [Quran5:2]

Besides, Anas ibn Malik narrated that the Prophet said: “Whoever leads to good, he is like the one who does it.”. [At-Tirmidhi]

Similarly, the one who guides to evil is like its doer.

Thus, it becomes clear that you are sinful by facilitating the matter of Zina (fornication or adultery) for them, so it is obligatory for you to repent to Allah – Glory be to Him – with sincere repentance. They must also repent, so that Allah may accept their repentance and forgive their sins. If you supplicate for forgiveness for them, Allah may make your supplication for them a reason for forgiveness.

Finally, we point out that the sin of the one who assists in the sin does not have to be similar in proportion to the sin of the perpetrator, but the similarity is in the origin of the sin.

Allah knows best.