It turns out it was my Aunt Kim, Sara's mother, who was walking through the door. My still hard cock was now pushed down my pantleg, but was making a very obvious salami-shape against my leg.
Her back was turned as she shut the door and said, "Trinity said she's gonna try a few more parties, I guess we shouldn't have booked ours until next week. I guess if we're lucky a few people might..." She stopped talking as she turned around and saw me awkwardly standing there in my nondescript superhero outfit, "Um," She said as she did a double-take at me, simply surprised at my presence, "Who are you? Where's Sara?"
"Um, bathroom," I said, trying to remember if I had a cover story or not for my clever disguise, my brain wasn't working right, probably because I had just gotten a blowjob from my cousin and all the blood was still in my cock. "I'm, um, a friend of Joanna's," I finally stammered. Jo was my stepmom.
I guess I should describe Aunt Kim. She's twice as hot as her daughter, who was already a perfect ten so I guess Kim was a twenty. She had boobs nearly as nice as my mother's, a tight bod, and a great ass. She jogged every day, sometimes with me, my mother, and sister, but we only did that once a week at best while she jogged every single day and it showed.
She was dressed up as an inmate, probably to match her daughter's "cop" outfit, except it was skin tight and did nothing for the imagination. It was so tight, in fact, I could tell that my aunt wasn't wearing panties or a bra.
She took a few steps towards me and as she did, my Aunt had completely changed her expression from one of surprise to see me to one of desire. "Is that a sausage in your pocket or are you just happy to see me?" She asked, lustfully as she crossed the distance between us, dropping her bag behind her on the ground.
I gulped as she got close enough to me that I was half certain she was going to bite me. "Um," I stammered, not sure what was going on. I'd never seen my aunt like this, she was usually a very conservative, motherly type. Despite having a rocking bod, I never saw her as being very sexual, "I, uh," a frog was caught in my throat.
She put a hand on my chest and leaned into me, resting her head on my chest. I took a deep breath, nervously, but my cock still twitched in my pants, "I know we just met," she said, "but I was worried this party was just going to be my sister and our daughters. This is usually the one night of the year I get to cut loose, and it'd be too bad if their weren't any men here." I guess Sara wasn't the only one who used this party to find one-night-stands.
I thought about pushing her away from me, I swear that I did... Aunt Kim started kissing me, and moaned as she reached a hand to my crotch and started feeling my hard cock through my pants. She started slowly jerking me off through the thin cloth.
I figured,
