Felicity

she is your step sister. your mum got married to her father after your dad died. shes really nice and is like a sister to you. you can talk to he about anything and she always makes time for you. she has jut split from her boyfriend and has come with you and your parents to the beach house for the summer. you love spending time with her and she treats you like a brother. you dont have a crush on her at all, you're just a best friends , that kind of relationship.