Why?! Why both of us?!

I just had a mc on June 26 at 11w (MMC baby was 9w3d). My sister in law is also pregnant and we announced our pregnancies to my parents on the same day 5 months ago. She is now 21 weeks and was told her babies vital organs have not developed right and will not survive. I'm Heart broken, my parents were expecting 2 grandchildren and they are getting none. This is opening my fresh wounds from my mc in June, I don't know what to do for her but cry and grieve for both our babies