What is the motive of Jalil’s wives in finding a suitor for Mariam Why does Jalil go along with them in this plan?

Jalil's wives simply want Miriam out of their way. They have children of their own, and Miriam, nor her mother, were ever a part of their lives. Jalil, on the other hand, feels as if he owes Miriam something. Thus, he wants to arrange her marriage and future before sending her away.