My thoughts on Aimee is that she is a child; Alma see's her like an immature young girl. I wouldn't say they have a relationship, but Alma would treat her like a young sister, considering she understands Aimee's illness, and both have shared what Alma considers a secret - their illness. Alma wouldn't hangout with Aimee, she wouldn't see her outside of group. She would give advice as an elder sister would, help if she could in anyway, but she wouldn't consider her a real friend or family. My character is a bit of a snob. So, she would consider Aimee much too young to be a friend or even someone at her level. Does this make sense?