okay i was at my grandma's house and i saw my sister runnin outside and my dad after her....he pulled her hair and twisted her around and pushed her twice into the house...when i got home she told me what happened in the house....she was upstairs changin and he told her to come outside so she said okay and when she did he was like go mow the yard and she said no and when she went to go back upstairs he pushed her (she was on the second step) and she almost fell into the rocking chair...all the times he pushed her so almost fell but caught herself so wat do i do? should i take his side or hers? she shouldnt have said no but he shouldnt have pushed her either...and she said next time she was goin to call the cops...and she wants to move into her friends house and my mom is pretty much takin my dads side...now im kinda scared to say no to him. plz help

is pushin considered domestic violence...she didnt fall though so im guessin it wasnt that hard of a push