Should I continue to talk to the family even though my child's father is not involved in her life?

Your child's father needs to start taking full responsibilities for his actions and stop being a jerk about it! His parents are doing the right thing by continuing to stay actively involved in your child's life! His father has done his part by raising his son to do the right thing and make better decisions, but he chose to travel down on the wrong side of the road! Your daughter deserves to have positive people in her life and you shouldn't cut off his family!