Recently, I had to undergo a fairly extensive and emotional medical procedure/operation. Not only did I receive an incredible amount of support from my sisters through phone/text/messages, one sister who I am very close to actually drove an hour to get me, drove an hour to the doctors, then drove the 2 hours home multiple times to bring me to the doctor's appointments, because neither of my parents could do it.
She never asked for gas or any reimbursement whatsoever, and would even come over on nights where I wasn't feeling well physically, just to be with me and watch stupid youtube videos together. Her selflessness and generosity made the process a million times easier, and I'm so glad I met her through my sorority