Today is my half-sisters memorial service in Colorado. I'm not sure how I'm supposed to feel about it. She passed away more than a month ago. I don't know all the details but from what I've gathered the memorial service was postponed because she wanted her ashes spread on Pikes Peak so the service was weather dependent. I was upset when she passed, though not distraught. We weren't close. The last time I saw her was at our mom's funeral more than 17 years ago. Neither am I close to the two half-sisters that are able to attend the service today. I feel like I should be grieving today, as my half-sisters are, but I'm not. Is that normal?