Parents forcing one to divorce one's wife

I am a male 36 years old. I was first married to my cousin 9 years ago and currently having 2 kids with her, 8 and 6 years old. Few months back I got married to a girl. This girl is from my family and is an illegitimate girl. I didn't know about her past and what zina her parents did. Her parents got married afterwards giving birth to her in 5 months after wedding. I have no issues as I believe that she is innocent and all fault goes to her parents. My parents do not agree to this marriage and are forcing me to leave her and the sole reason they are giving is because she is illegitimate. They are forcing me to a level saying to either leave her (divorce her) or leave them or they will kill themselves. I am in deep issues as I don't want to leave her in the middle of nowhere. I can fulfil rights of both the ladies as well as my kids and have offered them to keep any guarantees whatsoever.