Is Renesmee Cullen the child of Bella and Edward evil?

NO!

Renesmee is NOT evil. Renesmee has the best genetic mix from both Edward & Bella. She is very advanced intellectually and understands that she should not hurt humans.

Yes.

Bella and Edward find out that Bella is pregnant while they are on there honeymoon at Isle Esme. Edward is the biological dad and Bella carried Renesmee.