my dp has a 7 year old dd and she lives with dp and his mum, she had a rough start in life and has been with him for 4 years, she is so happy we are together 6 months now and had an instant attachment to me, but this seems to be going to far she gets cross with my 5 year old dd for hugging me pushing her out of the way,my dd fell over the other day and she just laughed and got cross with her for crying,she gets cross at the littlest things and screams its not far you love her more than me. how do i get the balance?