Characters who grew up in proximity but didn't share a childhood often have a unique "outsider-insider" perspective on one another.
My parents divorced when I was a teenager. A few years later, my dad remarried a woman with a daughter my age—my stepsister. We were polite but never close. Different houses, different loyalties, and unspoken hurt from the divorce made every holiday feel like a negotiation. tuflacasex my stepsister welcomes me to our par better