It turns out that MIL did break her ankle at the nursing home late last week. So they put her in a splint and sent her back late that evening. W also mentioned that the orthopaedic doctor who is going to see MIL next week is the same one that D saw while she had her broken arm. I told this to D after we got off the phone - D thought that was cool.
After I got the kids upstairs to get ready for bed, SIL called for an update. SIL made it a point to let me know how she appreciated me being so understanding and willing to step in to help out W. Even if W does not tell me so, it's nice to hear things like this coming from members of her family - especially since SIL knows about the difficulties of our sitch.
So we're going sometime this evening to celebrate MIL's birthday after we have had dinner. W likely will need to work some this afternoon and early evening after a conference call - business as usual.