The daughter made a mistake by posting this though. You don't want to affect your parents livelihood. If they mistreated you and haven't bothered to notice it, apologized and started the healing process then just let that bridge be burned. I have a few family members who I have completely cut off from my life. Revenge is a horrible path to take and proves that even at 23 now, she is highly immature and continues to make poor decisions.
This kind of beating looked to me as a regular one for that girl.. because she was quick to recover and get back to her things..I know how I was after a beating like, I sulked for days and days together till my dad apologized only because that was a once in a while thing, with something regular you get used to that..so imagine how she must have been coping with all her teenage problems.. also with her mom involved she couldn't tell her anything.. and as much as I know a girl tells her mom quite a lot.. bet this girl didn't tell her nothing..
I dont have any opinions on whether the girl did right or wrong.. I am just imagining her position right now.. the scars she still carries .. those are pretty tough scars.. and if she was getting these kind of beatings regularly then I will hold them at par with sexual abuse of a child..