That is indeed very unusual, I've never heard of an experience like that! I wonder what happened, maybe they were all part of a group or something?

Middle aged women make up a very small percentage of Couchsurfing, and when I see them they're usually hosts only. I get a ton of requests, and I think it'd be more likely for me to get a message from an astronaut than two middle aged women.

I just checked my references and my friends' references and didn't find one woman over 40. I really wonder what happened in your case!