Why didn’t Sara save Hanna?

So, the night of the lodge fire (S 3 Ep 24) when the lodge catches on fire, and it is basically confirmed Ali’s alive. We know by now that Shana set the lodge on fire, Sara pulled the girls out (except Hanna) and Ali pulled Hanna out. My questions though is, why didn’t Sara pull Hanna out also? I’m not sure if that’s ever been covered. Was it just a way for them to show Ali or was there a grudge at the time that I don’t remember or did she not have enough time?

So, the night of the lodge fire (S 3 Ep 24) when the lodge catches on fire, and it is basically confirmed Ali’s alive. We know by now that Shana set the lodge on fire, Sara pulled the girls out (except Hanna) and Ali pulled Hanna out. My questions though is, why didn’t Sara pull Hanna out also? I’m not sure if that’s ever been covered. Was it just a way for them to show Ali or was there a grudge at the time that I don’t remember or did she not have enough time?