Asalam aliekum,I had a sexual relation with a married woman and now her husband wants to kill me or asks for huge amount of money which i can't never get to pay him for the crime i did. Please tell me what should i do.
Alaikumassalam wa rahmatullah,
I doubt you can fix that situation by yourself. You should get other people involved, such as your family, his family, your local imam, people in your extended family who have a high social standing and who may be taken seriously by that man, and maybe the police if you fear for your life. That man has no right to take the law into his own hands, both according to Islamic law and secular law. If there is to be a legal solution, it will have to be decided by a judge, imam, or other members of society who can perform this job.
You may also want to check out this previous answer: How to repent from zina (sex outside of marriage)