Baby Shower/Life Problems

Ok so my family recently found out my mom has cancer and it's not good no cancer is I guess. But it was a real shock to my family. I'm at that time where my baby shower needs to be planned I'm six/seven months. My family was supposed to plan it but with everything going on I want to take that stress off the table. Now I'm trying to plan it but my sister says she's working on it and my cousin is trying to get involved. It's almost become an awkward subject to talk about and I'm not sure what to do. I already became involved and found a place that will work and is affordable. But now I'm wondering if I should back off? I'm not trying to tell my family their not doing am enough but I also want the hall taken care of and the invitations out. The food and decorating can go to them. Everyone's in a bad place and I'm trying not to make it worse but I feel like I kind of am- I just am really confused on what to do.