First time sex..

First time sex..Diana is 21 years old. She's the middle c***d of my girlfriend. She stands 5'7" tall; is all of 115 pounds; has dark, medium-length brown hair with the cutest bangs that hover over her large, yet sophisticated glasses; has the cheekbones and face of a runway model; long, thin arms; toned legs; beautiful olive skin; a v-shaped back with an extremely thin waste that tapers down to an ass ANY man would feel an immediate tingle in their cock for; and while extremely bright and bubbly, she also has a "dark side" to her (I suspected at first, then found out later it was true - thus this story). I first met Diana about 2 years ago. She had most everything described above then, but without the years that have gone by since. Diana "blossomed" more and more over the years, and I couldn't help but notice her maturity as a person and as a young woman.Once we were all living together under the same roof, Diana would come out of her room wearing little to nothing once she got home from school. She preferred Joe Boxer pajama bottoms that really highlighted her ass, as well as low-cut camisoles that revealed much of her B-cup breasts. As she got older, she began showing more and more when she came out to the kitchen to take her turn at doing the dishes when I was around. She LOVED to bend over when I was behind her, and especially when I was in front of her so I could literally see her bra-less, supple titties as she bent over to put dishes into the lower rack of the dishwasher. After a few repetitive evenings of her playful "show