I'm a step father to the above mentioned children and have been for 2 years. This situation has been bothering me since I've been with their BM. The son is very sensitive, always needs attention, smothers anyone he starts a conversation with, can't accept being wrong (even though it happens a lot), and whenever I try to explain stuff to him, he first words are "No, but...".
The daughter is not as sensitive, not as much bothers her, she doesn't have a ask for attention and tends to get it just being herself. She's a little more kniving than he is. She loves him and wants to do stuff with him, but all he wants is to do stuff with my wife and me, and preferabbly without his sister.
Both never did seem to find regular friends in our neighorhood, so it's basically playing with each other, and she drives him nuts.
Last weekend he chose to spend the weekend at his grandmother's with just him, and tonight his mom promised him a night of doing stuff with just him.
This is what led me to questiong this. He is turning into the biggest sissy and does nothing but complains about everything eating, doing chores, and especially his little sister.
I just want him to love his little sister because she'll need him to as they grow older.