Helping a child grieve

N • Beautiful Nikolai born 12/29/17 👶💙 Lucca born 1/13/21🌻 In love and feeling myself 👨‍👩‍👦‍👦

Can anyone give me advice? My eleven year old sister is very upset as we lost Nana this morning. She sees her regular therapist this week and we have our cousin coming over tonight who is her best friend (and also very upset). Is there anything else we can do to help her? We are just comforting her right now and letting her cry. It's really hard on her, Nana has been with us since I was a baby and she lived with us up until she had to go to a nursing home a few months back. Her death was sudden and not expected at all, we had just talked to her last night and said our goodnights like we always do.