Sue doesn't have sleepwear, but she does have a short little robe you can use

By the looks of things your sister either sleeps in the nude, which makes your already aroused sex throb at the thought, or she wears a t-shirt and underwear. As you're about to give up you spot a silver silk robe. It's not lingerie, but it seems to be the closest thing to sleepwear that Sue has.

It feels wonderful when you put it on, and when you look at yourself in the mirror you see that aside from showing most of your your shapely thighs it also clings to you. Your rock-hard nipples tent the material atop your breasts. It's all you can do to not dig your hands into those twin bulges.

Carelessly you pull the robe closed and tie the sash loosely, but deciding it looks a little **** you practice the maneuver a few times before satisfied that you can reproduce the 'precariously closed' look without and look natural doing it.

"Not that he'll see all of it," you mutter, then slip on the 'matching' slippers. They're not exactly fuck-me heels, being soft-soled and almost entirely flat, but they match the color.

"Excellent," you proclaim, eyeing yourself in the mirror from multiple angles. You could watch this body all day.

"Showtime," you mutter, pulling off the robe, counting to three, and then slipping one arm in as you open the bedroom door.

"Is someone there? I thought I heard something," you say in your best sleepy voice, slipping the other arm in. You wander down the stairs, reaching the bottom just as you manage to start pulling the robe closed.

"Hello?" you call out, rounding the corner to the front door, a line of flesh down the center of your body showing for the briefest moment before you pull on the sash, tying the silk closed in a haphazard manner.