Haha. I just came out to a semi close friend of mine at work and got a different but similar reaction. She was cool with it, but instantly brought up all the gay people she knew and how ok she was with their lifestyle. To the point that I had to remind her that I wasn't gay, nor was I having a sexual relationship with my boyfriend's other girlfriend.
Part of me thought it was funny, but I didn't know how much she had assumed. Everyone involved (both my boyfriend's and boyfriend's girlfriend are all straight). Either way she was pretty cool, but it's funny how similar that went