so why isn't she screaming for help -_-

maybe she s waiting for them to leave so they wont come back and gag her ?

doesnt really make sense since this wouldnt come back through the fire, would they?
in the first place idk why they didnt gag her

More than likely. While screaming can help a little with clearing your lungs of smoke (as that’s what is actually going to kill you first) the longer you can go without breathing it in the first place is always better.