Quinn, I'm glad you checked in and I hope you got some good sleep in your own bed last night. I know being stuck in the middle is hard; your family needs you, your mom needs you...sometimes there simply isn't enough to go around. Somewhere in there you have to take care of yourself, too, and spin some more plates in the air.
At least your brother is able to give you a reprieve this weekend; maybe this will help him see the significance of the situation and he'll step on up. Glad to hear you're maintaining, too; sometimes that's the best you can do till you can pick it up again.
And now that you don't have to be perfect, you can be good.