"No Kathy, you can't go. This costume party is adults only. You go to the kids party."
"Dammit Dad, I'm eighteen!"
Mom chuckled. "Dear, the party is just a bunch of us old farts." Mom stood up slowly and rubbed her head. "You okay, Mom? You don't look good."
"Just a headache. A shower and few of my magic pills will fix it."
"You're going to the party, right Mom? I mean, dad's crazy about this stuff."
"Yes, I'll go to his silly party." Dad ran out dressed as a circus clown with a scary smile.
"Dad you're a freak."
"Thanks. I'm headed to the party now. See you in a jiff."
Half an hour later, Dad texted. "Hi Kathy, it's the clown. Has your mother left yet?"
"I think she's getting dressed." I walked to her bedroom door. Mom was sprawled naked out on the bed. She'd passed out from her magic pills. Shit. Then I noticed Mom's costume, a Batgirl outfit. Suddenly, I had an idea.
I texted Dad. "Mom's getting dressed. Be there soon." So tonight I had double disguises. Batgirl and Mom! Yes, I could do this bit of trickery. And show Dad he was wrong not to invite me.
I stripped off my clothes. It felt weird undressing in front of my passed-out mother. I pulled on the sexy costume. My tits were a bit bigger than Mom's. The top made my tits bulge out, and tight shorts wedged into my pussy lips. I didn't mind having a camel toe, but my pubes bulged out the sides. I guess my cunt was hairier than my mother's.
Ducking into the bathroom, I grabbed the shaving cream and razor, and lathered up my hairy beast. It quivered as my fingers brushed my clit. My horny pussy hadn't had sex for months.
Slipping on the costume, I looked at myself in the mirror and saw a sexy Batgirl. Excellent. I drove over.
The party was in full swing. Loud music and dim lights. People were drinking, dancing, and chatting. A few people were on the couch making out. These weren't old farts. I ducked between superheroes, dinosaurs, pirates, and vampires.
Plus, there were free drinks. I gulped down a few for liquid confidence. My alcohol-fueled brain was in full buzz. I felt sexy and ready to rock. Dad danced over to me and hugged me tight, squishing y tits.