it is the choice of 1st wife she may not allege bigamy and may even bear dowry demand and domestic violence, if any. there is choice for 2nd file to apply or not to apply annullment of marriage even if she has been duped into the marriage by husband claiming to be bachelor. however the queries has not state the religion of the family. it may or may not be muslim family. but either way the law cannot expect second wife to bear domestic violence and dowry demand, if any.