Abby and Maya

Abby (left) your step sister, and Maya (right) your step sister's best friend, are home from college for the summer. It's just the three of you since your parents are out of the country for vacation. Maya has always had a strong effect on you. She's very proactive, and likes to use her body to tease you. One day Maya starts to joking to Abby about how they both look so similar so it must mean that you're attracted to her. Abby, denies it, stating that you've always treated her like a real sister. Maya is dead set on proving her point.