What's a good Mother's Day gift idea for someone who isn't your mom?

I've been living with my best friend and her family since September. They've made me feel welcome and like I'm really apart of their family. I know Mother's Day is coming up in a little over a month, and I want to get her mom something. I go to her mom for almost everything. She has been there for me, and told me to move in with her because of problems within my own family. She said she doesn't want jewelry, so my previous gift idea is down the drain. I love her like she is my own mom, she has told me plenty of times before she thinks of me as ome of her own. She is hardworking. (Note, I work with her) I see every day how she tries to do her very best for a single mom raising 3 kids, and taking another one in. I'm so stumped what to get her. I want to get her something perfect! She is a very do-it-yourself kind of person. She is one of the most amazing people I've ever met. And feel truly blessed to have gotten to know her, but I don't know what to get her. I want to show her I appreciate her, and everything she has done for me. Any help would be greatly appreciated! Thank you! God bless!(:

(I'm also 17, so if that helps any.)