I NEED help with TEENAGERS?

I completely understand how you feel. From my perspective, the relationship between your sister and someone you know very well it can be really hard at times because you're all too close. But, both of your families lost a loved one which I feel kept you guys close. There are times where people get stressed out and they say words they don't mean. Honestly, I've done that many times to people I love the most. You're being a great sister by taking responsibility for your younger sisters. By taking in your sisters, you are put under a large amount of responsibility and you'll have times where you'll get mad. There's not a lot you can do to change how they feel, but there are some things you can do to help them learn to forgive you for your mistake. One thing I suggest is to give them a few days to cool down. Once they're cooled off, you can try talking to them one at a time. Let them know that what you said you didn't mean and that you're concerned about them. You seem to be protective, so that's one thing you can mention if that's true. Make sure that they understand that you made a mistake, you're here to help them and you do care and love them.