All of human experience is relative. If you were born with a silver spoon up your nose and inherited a mountain of dragon-gold on your 18th birthday, stubbing your toe is going to be a Shakespearean tragedy. If you've struggled all your life just to get by and you're suddenly blessed by a few hundred dollars, you might be tempted to help a friend out of a financial jam or donate some of it to charity.
Likewise... if you've never really felt like someone loved and understood you before, the first person to come along and do anything even remotely similar to that is going to stand out like a beacon in your mind. Even if they're a sibling.
The act of being there during a moment of vulnerability and making her feel safe could simply be a moment Alexis hasn't experienced before, and like a dream her mind is trying to patch that new stimuli into the tapestry of her life as best it can.
Likewise... if you've never really felt like someone loved and understood you before, the first person to come along and do anything even remotely similar to that is going to stand out like a beacon in your mind. Even if they're a sibling.
The act of being there during a moment of vulnerability and making her feel safe could simply be a moment Alexis hasn't experienced before, and like a dream her mind is trying to patch that new stimuli into the tapestry of her life as best it can.