Is it normal to be attracted to your half-sister?
Attraction to a half-sibling can happen, even if it feels unsettling or uncommon. Having a feeling doesn’t mean you have to act on it; keeping clear family boundaries matters.
Feelings can show up in ways you didn’t choose, and having one doesn’t make you a bad person. Attraction to a sibling may be less common than an ordinary crush, and plenty of people would find it uncomfortable—but you’re not the only person to have an unexpected or confusing feeling like this.
What matters is how you handle it. Keep appropriate boundaries and don’t pressure or pursue your half-sister; family relationships can carry complications that a passing feeling doesn’t. If the attraction is persistent or upsetting, talking it through privately with a therapist can help without turning it into a judgment about you.