Hi all! Pumpkin here. Feeling okay though I've got a cold and allergies. How's everyone else? Wavy, I am planning to go to the barre class this weekend if my cold passes, which I think is about 50/50 at this point. If not, I will be planning to go next week. JinDC, will miss you this week! It will be so much fun if we all end up going.
Afield, congrats on the twins! Wow! I thought we were possibly having twins early on but the sono said just one pea in the pod. One quick thing, I hate to be the one to break it to you, but I think twin weight gain is waaaaaaay more than that. The recommended range is 37 - 54 lbs!

I just had two friends who had twins, both had healthy, almost full term twin pregnancies, (one went at 36.6 and the other at 37 but with scheduled C) and both started out as tiny women (about your wife's size) and both gained that much or more. I myself gained 40+ lbs with my first and I was slim to start with. (I did take it all off with nursing, though some of it found me again).
Anyway, this is for afield.
http://www.mayoclinic.com/health/pregnancy-weight-gain/PR00111