Prayer for healing in relationship

please pray for my grandson and his daughter...and for his daughter's mother to stop being cruel...he showed me her texts and she is undermining his relationship with his daughter...who is behaving very rude and unkind...to me and to my husband and to our dog...and now even to her dad...her mother is unstable and troubled in her own life and now it's flowing over into her daughter's life and into our grandson's life...other than praying for God to heal all of these troubling circumstances...I don't know what to do...my husband has had two strokes and she is mean and unkind...she use to be loving and kind and to the dog and to me and esp. to her dad...she is 11 now..almost 12 and is on the autism spectrum...so the school says...I pray for God to heal her and to bind this little girl and her dad together with His Love and with cords that can never be broken in Jesus Name I pray Amen