Go to the party.

I agreed to the proposal and drove to my aunt’s home the next Friday evening. I had even bought some booze for them. Nothing fancy but her friends would probably appreciate it. Strangely, it felt like I was taking a girl to prom again—the dancing at this party would be quite different, though.
 My aunt opened the door and gave me a big hug. ‘Thanks again for doing this, John. She’s been really excited all week.’
 I told her it was no problem and that it would be fun. We waited for Anne in the kitchen together, making idle small talk. When my cousin came down from her room I was surprised. She was wearing plain jeans and a conservative, frilly top. I wouldn’t have been embarrassed seeing my own mother wearing her outfit. On her arm, she had a pretty big bag.
 I went over to her and gave her a big hug. ‘Hey, Anne. You look cute.’ I gave her but a little squeeze.
 ‘Thanks, John. Can we go? I told Jessy we’d pick her up, okay?’ she nearly dragged me to the door.
 ‘Sure, you’ll have to give me directions, though.’

We arrived at Jessy’s home shortly thereafter and Anne told me to wait in the car. She went inside, taking her bag with her, and several minutes went by. When she was gone for a good half hour I started wondering what the hell they were doing but my question was answered not long after.
 Anne emerged with another young girl, who must’ve been Jessy. My cousin had transformed drastically. She was now wearing a nearly painted-on and very short black dress. It showed her toned and tanned calves and thighs. On her feet, she had ditched the white sneakers she had worn for lace-up high-heels. Her make-up changed too, what had been a plain Girl-Next-Door look before was replaced by deep black eyeliner and eyeshadow with ruby red lipstick. Her wavy brunette hair, which was normally in a pony-tail or braid, was flowing down just past her shoulders. To be honest, she looked like an escort girl. We always playfully teased and touched each other, but I had never seen my cousin in an outfit like that. I felt a bit guilty at the thoughts that entered my mind.
 The shock at my cousin’s transformation was doing a disservice to her best friend Jessy. She was every bit as gorgeous as Anne. She wore a similar outfit in blue, but she was filling it out a bit more than Anne. Her dark red hair was probably dyed but it had a healthy sheen to it and contrasted nicely with the blue dress.

They climbed in my car and my cousin took the front seat again.
 ‘Jessy, I want you to meet my dearest cousin John. John, this is my best friend forever Jessy!’ Anne introduced us.
 ‘Great to finally meet you, John. Anne talks a lot about you,’ Jessy said with a sultry voice and a near predatory twinkle in her eye.
 ‘Likewise, I’ve heard a bit about you too,’ I tried making small-talk. ‘Hey, I got you gals some **** for the party. Always good to bring some gifts, right?
 Jessy’s eyes lit up. ‘I like your cousin already, Anne!’ she laughed.

During the drive to the party, I kept glancing into my rear-view mirror and saw Jessy smiling at me.

I parked a bit down the road from the party house and turned to the girls. ‘Okay, I didn’t expect this but you two are obviously far less innocent than I thought,’ I started, ‘You’re both dressed to kill, and I guess you’re looking to get laid.’ I reached over to the glovebox and opened it. As I pulled out a pack of condoms, I said, ‘I won’t tell you not to do it but being the responsible chaperone that I am I’m telling you to have safe-sex.’
 Anne blushed a bit, not expecting sex-ed from her own cousin. ‘John, we’re both on the pill, we don’t need those.’
 ‘It’s not just about pregnancy, cuz. You’ll be hooking up with some random guy, right? Not a boyfriend? Then you’d rather be safe than sorry,’ I said as I pressed one of the plastic-wrappers in her hand.
 She took it and put it into the small handbag she carried. ‘Th—Thanks, I guess.’
 ‘Can I have more than one, John?’ Jessy asked with a Cheshire-cat grin on her lips.
 I gave her a whole strip and we got out of the car. I took the bottles I had bought for them out of the trunk and handed one of them to each of the girls before we got on our way. Jessy immediately took my arm in hers and walked very closely to me.
 Anne couldn’t help but giggle at her friend.

When we arrived at the door, there was already loud music blaring and one could hear laughter and shouting from the backyard.

My cousin told her BFF to go in and took me to the side for a moment. ‘Damn I haven’t seen Jessy act like that with anyone in a while. She really seems to like you, cuz. And she has hooked up with guys she was into way less than you, John’ She giggled.
 I looked at her curiously. ‘Would that be a problem? If I hooked up with her?’
 ‘Only if you don’t want her to tell me all the details about it,’ she grinned, ‘Believe me, we tell each other everything—and we are brutally honest!’
 I just smiled and nodded at her.

We went inside and promised to meet at the entrance again at midnight if we lost each other.