No, its not odd at all. Why post the obvious? I thought any logical person would presume and understand that Ted's wife and children would be upset and angry. I'm sorry you couldn't comprehend the obvious.
I'm not blaming the child. If I were Ted's teenage kid I would not and could not play big brother to his love child. The fault is all on Ted and his girlfriend. Once, more you failed to understand the obvious.
What was odd was YOUR choice to call him a 'bastard' not the made up thoughts you attribute to his family.
Why is it odd, because the insult you level at the boy by calling him a bastard is all the doing of Ted. So it is ironic that you would insult the child. He is only a 'bastard' to the extent Ted refuses to be a father, get it?