Iran was the child of Arjuna. Before the beginning of  Kurukshetra, he chose to forfeit himself to the goddess kali so the triumph will be guaranteed to Pandavas.

Be that as it may, the genuine issue raised in light of the fact that nobody would wed an individual who might be kicking the bucket after marriage. 

At that point, Krishna became Mohini and hitched to Iravan. After Iravan kicked the bucket Mohini sobbed and was dismally similar to a widow.