How to deal with a selfish/self-centered sibling?
My sister is by far, the most selfish person I've known to exist in this world. She seems oblivious to her actions and selfishness. For example, when I buy treats from shops, I'll usually share it with the family and her. I'll allow her to take as much as she wants and she seemed "pleased" to eat whatever I have. However, she never once ever thought of offering me anything from her snack drawer, nor did she ever leave those snacks on her desk at plain sight. She would hide it deep inside her drawer and (possibly) "hide" it from me. I have every penny to buy tons of those snacks so I don't know why she's doing that? But it hurts to see her actions. Furthermore, she would ask my mom to buy her favorite treats and foods. Some of those foods I would dislike but she didn't bother to ask anyway, she just asks my mom to buy them. Item wise, when she lends me money or any stationery, she would keep an eye contact with it, and demand it back immediately after I've finished using it, when I loan out my stuff, I do less to bother how long it took for her to return. Why is my sister so self-centered?