So, her parents died a typical, pointless death. Instead of grabbing her and jumping from the cliff together with her, they push her off deciding it's better for themselves to be eaten. Jumping from cliffs isn't a good idea. If it wasn't for plot armour, she'd likely die. If you're going to risk your daughter's life with a stupid plan like that, then jump in with her to give her the best chance in case she, I don't know, gets knocked unconscious, needs a meat cushion against the rocks or can't swim when fully clothed (clothes are damn heavy when wet).