The main thing is to try to relax. It's definitely exciting to think about being with two women together and easy to get real worked up and start worrying. Communication is the key to everyone having a good time. Don't assume the other woman is "wired" like your girlfriend; find out what she likes and doesn't like so much as you go.
Pace yourself, too. Keep in mind two women can cum a whole lot (hopefully) more than you and not feel like falling back on to the bed and napping

. Take your time with each or together and just savor the experience.
Your question about condoms was a good one. Yes, try to use a different condom with each woman, each time. You don't know otherwise you might be passing between them.
Last thing is that you need to post to the forum and let us know how it went!
