Just wanted to update that she's 32 weeks now and still pregnant. That bout in the hospital lasted about 3 weeks. She's been back a couple times because of regular contractions, but those have only been one-day or overnight visits. She's still home on bedrest but isn't totally following the rules because it makes her crazy. I'm pretty sure that now that she's 32 weeks, if she did start contracting regularly they may not make as huge of an effort to stop the contractions, and just deliver.
I can tell she's going crazy being stuck on bedrest and not having anyone to see/talk to all day, so I try to call her frequently and either invite her over (BIL drops her off when he goes to work) or go over there to see her. And she loves to hold my 3-month-old, I think he helps get her excited about her own baby.
It's nice to be important, but it's more important to be nice.