Cousin is about 15 years younger than me. She is 17. Its been the expectation from family members that I buy a gift for her birthday and Christmas. Obviously get nothing from her as she is a teenager but also get nothing from her mother (my aunt). Aunt doesn't even send me a birthday card or birthday text message. Don't get a thank you message/ acknowledgement for the gift I send most of the time either. WIBU to stop getting my cousin a gift after she turns 18?