You begged her to speak softer so your mom wouldn't notice

"Oh, hey sis." You said embarrassed. You didn't wanted to get caught wearing a skirt, but now your sister did. And you knew that that will cause some trouble for you. "I can explain this." You grabed the skirts hem and tried to pull it down, hoping it would somehow get longer, but that was nothing more than wishful thinking.

"You can explain why I find my little brother in a mini-skirt walking up the stairs? And is even wearing a La Senza T-shirt?" She asked with a tang of irony.

"Please don't be so loud." You replied softer. "I don't want mom to hear."

"Then we better speak about it somewhere else." Alison agreed with an unnecessary soft voice, again showing signs of irony. "Then let's continue upstairs, in my room."

You didn't have much of a choice but to do as she said. You turned around and took the last steps up. As you did, you tried to pull on the skirt's back to hide the fact you were wearing pink bikini panties.

You walked into your sister's, followed by her. She closeed the door behind herself and flasheed the lights. "Now explain why I catch you in a mini-skirt, a girl's T-shirt and wearing pink panties." She said with a smile and a firm voice making clear she'll not let out of it.