Fucking my ex gf, six years later. [m/f]

This happened just a couple weeks ago, so the juicy details are still fresh in my mind. There's quite the lead up, so I'll mark when shit really starts to go down.

Katy was my high school girlfriend. Picture her, 18 years old, petite girl, cute, shy, and athletic with shoulder length dirty blonde hair and big doughy hazel "fuck me" eyes. All of 5'3, and 125 lbs, she was a volleyball player and quite toned. Pretty face, not overtly sexy but cute, nice perky 'c' cup tits with big fluffy pink nipples and that ass…. It didn't even make sense. To this day I still don't understand how a girl that tiny had hips and an ass like she did. She turned a lovely tan shade of brown throughout the summer, leaving pale tan lines, which seemed to accentuate her curves further. Her ass was creamy white, massive, tight with just enough give, the kind you just want to bury your face into. Just thinking about it now gives me a semi. She was always a pretty girl, but I've spent nights just lamenting her fat luscious ass. Closest thing I can think of is Sasha grey's ass but on a much smaller frame.