That's sweet that you're letting your friend have the spotlight for a while. When I was about 2 months pregnant with my second, I was so sick. I was seriously GREEN, I was so sick. A friend, who had been trying for over a year came by and I told her because she was starting to get worried because I was so sick all the time
She was sooo excited for me, but didn't share her secret even though she was busting to tell me. 15 minutes earlier, she confirmed her pregnancy at the hospital around the corner from my house and was planning to show me the ultrasound pic when she came over!
When she finally told me a few weeks later, we had a good laugh!