"Hmm mmm?" You mumble behind the pacifier while you paw at the contents of Big Sis's backpack. All it looks like is a pile of black and white rubber sheets, like the insides of the bedsheets Mommy got you when you turned three. What is this, a heavy, floppy sheet ghost costume?
Big Sis yanks the largest piece away from you and unfolds it. With a hefty FLUMP, the one-piece swimsuit is revealed. It's not ordinary beach wear though; it has a tail and flippers, and a zipper on the back. Come to think of it, the black hide and white belly reminds you of that movie Mommy showed you...
"AH HRRHRR HLL?"
"Yeah, a killer whale, cool huh? I got this from some guy from Japan, don't ask how."
"HWW?" You ask your Big Sis anyways. She ignores you while unzipping the back of the costume and dumping some starchy baby powder on the inside. With your options being either this or sitting around the bathroom in a diaper, you graciously step inside the swimsuit. Though the outside of its rubbery body sticks to your skin, the powder on the inside lets the latex glide gently. When Big Sis has the suit pulled up to your big butt, she grunts and yanks to get it over the hump. A pair of stiff, pleated frills are wrapped around each leg hole, just enough to hide the pant legs on your rubber pants.
"Don't just stand there, you big dummy!" Big Sis shakes your shoulder to make sure you're not daydreaming. Brought back to attention, you let her guide both your hands into a pair of orca flippers. Though they're longer than your hands, they each have a solid mould of latex on the inside, which limits the amount of wiggling and struggling your fingers can do. The soft bendiness of these fins makes them even less useful than a pair of boxing gloves.
Big Sis rolls her eyes when she watches you panic at your loss of mobility. "It's just for one night, geez Louise." She pulls up the zipper on your back, and... you don't even flinch or question the need for a hidden lock at the top of the zipper as it clicks behind you. You're just used to it by now. Her pointer finger traces along the inside of the tall, narrow neck of the swimsuit to make sure it isn't folded in on itself. You try the same, still not used to the equivalent of trying to pick something up with two rubber chicken toys.
"RRMPH..." Not even bothering to speak words, you just grunt in frustration. Big Sis comes up with two more pieces of your costume; a pair of tall, black-and-white rubber socks which vaguely match the theme of the swimsuit. There's no difficulty at all as she pulls them over your legs; the only brief struggle is fitting your plain human feet past the crook between the sock's foot and ankle, each requiring a little more force until they pop through the narrow openings. The stockings settle at about mid-thigh, somehow bringing even more attention to your diaper bulge than when you were naked.
You rock back and forth on your ankles, distracted by how the stockings seem to have tough soles on their bottoms. Are they meant to be worn without shoes? Staring at the curvature of your toes under the latex, you hardly notice when Big Sis drapes a wig over your hair! It's the same shade of black as the back of your swimsuit, with a pair of white spots right where an orca's "eyebrows" would be. "Look," says Big Sis, "It's covering up the big dumb bruise on your head, see?" You shake your new hair from side to side, and the sore spot isn't visible at any angle... though your natural hair slips out from under it, making Big Sis push it back inside.
The costume looks almost done... except for the limp, empty whale tail dangling behind you. "Check this out," says Big Sis as she opens a valve on the tail and attaches it to a bicycle pump. After a minute or two of pumping, your tail has become long, tall, rigid and a little bit cumbersome. You slap it with one useless whale fin and watch it wobble like that clown punching bag you used to have until Big Sis broke it. "MMPH," you say as you smile behind the pacifier. This could be fun!
"Okay Kim, let's haul ass while there's still candy." You head outside with her, then wince as you walk right into a sheet of falling rain! The streets are nearly empty of trick-or-treaters, as all the little kids about your age were herded back inside and all the teenagers decide to party indoors instead. It looks grim... but it also means that you and Big Sis have all the candy to yourselves. Between your swimsuit and her polyester astronaut costume, neither of you is worried about a few raindrops.
Oh yeah, this is going to be a hell of a Halloween.