Watching my girlfriend with another girl [M/F/F]

Hey everyone, I have enjoyed reading stories here for a while now, and I thought I would post what this last year has been like for me in college. My story involves myself (5’10 with athletic build, 145 lbs, and around 6″ when I’m excited), my girlfriend Whitney (5’4″, curvy athletic – like a volleyball player – full B cup and a nice ass), and her roommate Kim (5’8″, athletic as well – think soccer player – Full C cup but a smaller ass).

I have been dating my girlfriend Whitney since freshman year, we have always had a great relationship. Whitney was raised in a pretty conservative home, so she had a steep learning curve. Despite that she had always been open to learning and trying new things. I had got her into watching some porn with me a year into our relationship and she really seemed to enjoy it. One of the most intriguing things about this was that Whitney enjoyed watching girl on girl porn. While she is only attracted to guys, something about girls making out and going down on each other really turned her on.