Just feeling sad

I'm in my third tri and I've teased my sister that she should try having another baby so we could be pregnant together. She's told me they were going to start trying towards the end of the year so her baby would be 2, so I just good naturedly teased and told her how fun it would be if they tried a little sooner. I hadn't teased her for quite while, this was more towards the beginning of my pregnancy. Well... A couple weeks ago she let me know she was pregnant, but it wasn't looking good. This past weekend they had a confirmed miscarriage. My heart is so broken for her. She asks about my baby and is still so happy for us, but I feel so bad to talk about my pregnancy around her.. and my heart grieves for this niece or nephew that I'll never get to meet. She doesn't want anyone knowing just yet, but I guess I'm just posting here because my heart hurts too and I needed to talk about it. I can't imagine what she's feeling, and it makes me sick to my stomach that my baby shower is in two weeks and she'll be there smiling for me but hurting inside. I really wish I could just cancel the baby shower, but everyone has already put so much into it and I know she would tell me not to. I just don't much feel like celebrating myself now. I can't imagine how she's feeling💔