Who is Renee from Eclipse and what is their importance?

Renee is Bella's mother. Renee was very young when she married a virtual stranger and gave birth to Bella. For this reason Bella is against marriage at a young age even though Edward has made it a condition of her becoming a vampire. Renee is also quite immature and Bella feels as though she has essentially raised her mother rather than it going the other way around. However, Renee is also very observant and has come to recognize that there is something odd about Bella's relationship with Edward. Bella feels concern about what will happen when she transitions into a vampire.