User blog comment:B214/Question and Answers/@comment-94.128.225.24-20130127045105/@comment-1359322-20130127051305

The agreement of the Phenex Family and Gremory Family is a fake. The Gremory Family allowed Issei to have multiple wives and the Phenex Family just wants to sent their daughter to Issei.

P.S. The author already state the positions of the girls before so the chances of Ravel being the second wife is zero.