history: My sister who is living overseas sent me a package with some presents the other day. She did this without telling me and I was really happy to get it. I recently got a care package from my sister who lives overseas. She didn't tell me that she was sending it. But it really delighted me. You are so lucky to have such caring sister
current: Thank you. I agree. She really is great most of the time.
next: I hope you can reciprocate by sending her a birthday message  when it's time for it so she knows you care for her 