Help please!

I have this 'friend' (I put it like that bc, she's my son's father's, cousin's wife. We text and hang some times but, she's more a friendly aquantance.) any way in the last couple months she has had 3 miscarriages. She and her husband already have 2 children. Her family does not suport her in having more children because, of their financhial situation. She just text me saying she's pregnant again. I'm just not sure how to suport her. I know she wants me to be excited for her but, with her history she very well may miscarry in a week or two. It's really sad and I feel for her but, at the same time my head is screaming, "give your body a break!" IDK if that helps any to wait a year and try again rather than just going right back at it. I want to suport her but, at the same time I don't want to get her all excited and then her loose this baby too. I also don't want to come off as cold or anything trying not to get her hopes up either. Any advice on what I should do or how I should act? Please!