Bobby tried to have a rational discussion with Jenna about the pregnancy, but she turned into an irrational screaming shrew., which was not in Lucas 's best interest. He did the right thing for Lucas's sake by not marrying Jenna just because she was pregnant, it would have been a huge mistake. Bobby was willing to take responsibility and had the emotional and financial resources to raise the baby, but Jenna wouldn't even involve him in the decision about whether she was going to terminate the pregnancy or not. But yet he still stepped up to the plate and got Jenna to the hospital when she went into labor. And what does Jenna do? She makes things even worse for Lucas by marrying Bobby's brother and making a play for Bobby when she finally does allow him to see Lucas. But again Bobby does the right thing for Lucas's sake and makes the sacrifice of letting Ray raise him as his own. Jenna was the one who never "showed any concern" for her children, she led Charlie to believe that Bobby was her father and never did anything in Charlie or Lucas's best interest.