Why did your character join the RAC? In memory of her wife, and also to feel closer to Rachelle, since she loved the RAC so much. It basically continues to let her life in denial and wallow in her loss, but it's given her other things too that are more healthy so there's that.
What might they be doing now if they hadn't joined? Still a medical researcher, but living a very quiet and lonely life.
When they picture their future, what do they see? Keeping the Whiskey Sour alive. She really has no plans outside of that. If she was honest with herself she'd probably want to find love again, but she feels like even thinking about that twenty years in the future is a betrayal. siiiigh.