Jealousy

It seems as if my son has become a jealous monster. Anytime I am playing with, nursing, changing or giving any sore of attention to Ava, Aden lays on the floor and (very gently) bonks his head on the ground and then fusses and whines, saying, "Owwweeeee owwweeeee" and runs to me so that I can give him kisses and make it better. I think that he is getting a 2 year old molar because he has a big bump in the very back of his mouth. I have also been hit by my precious son a few times in the last couple of days...I think we've entered our terrible two's a bit early!!!!!! Someone SAVE ME from my children!!!!!!!!!!!!!!!!!!!!!!!!!!!!!