I completed the task about 15 mimutes ago, right before everyones alarms start waking them up.
Getting Prepared
1. I walked naked to the bathroom and placed a thin, white, short t-shirt in the bathroom. It was long enough to cover my butt and maybe another inch.
2. I went back to my bedroom to insert a butt plug and put on my nipple clamps, and stepped out of the bedroom to the 2nd floor hallway that connects all bedrooms.
3. I sat on the floor and spread my legs while using a dildo and stimming my clit until.I edged, allthewhile trying not to moan or make other sounds. After I edged, I crawled to the bathroom.
Dice Rolls 
4. First roll was tails, which allowed me a warm shower. I removed clamps and plug only while showering.
5. Second roll was heads. I put on my tshirt on my wet body. The tshirt became wet and transparent almost everywhere.
6. Third roll was tails. I inserted the plug and walked to my room with clamps and dildo in hand.
Extra Step
7. I removed the dildo in my room and went to make myself coffee in the kitchen, wearing my tshirt. When I was there my brother came down and stopped in his tracks staring at me. I finished making coffee, while we tried not to look, but stared at me everytime I looked away. After I made coffee, I walked off back to my room. While walking, I lifted one butt hand up, that raised raised the shirt and exposed a part of my butt. I lowered it but did not look back.
I think he saw.