Beth,
Okay... first off, you do not seem to me to be a person who envies or gets jealous, so what I'm going to say is just a general thought, not that I'm thinking it "fits" you based on anything I've ever noticed about you (and I hope that makes sense!)
Just seemed like it may be a possibility (because I can see myself possibly reacting this way) that you might be feeling as though - - here she is, already doted on, a physician and all... and now she's going to have a child, too!??!! Too much!! And here I am, with 2 children who get ignored/neglected by their grandparents, for the most part, but I bet that they'll be all over her child, spoiling it rotten and paying all sorts of attention.
..... just another nip and tuck in her perfectly manicured life, ovulation sticks and all. Yes, it's annoying.
((((((((Beth)))))))) I might be all wet, but so many of the things you've written about your folks are so similar to my own, just thought it might be worth chiming in.
Love,
Carolyn