She had been coming to me for a long time, whenever she had been having doubts or did not understand something. It shocked me that she locked the door...today. She was wearing jeans and a long t-shirt which fitted her loosely. Her bag hung over her shoulder, and although she was looking tired there was a different shine in her eyes. She dropped herself in the chair across my desk and took long, deep breaths. With the in and out breathing, her not-so-heavy breasts were moving beautifully. All my. His mother and 9 yo sister were getting ready to go out shopping. They left and said they would be a couple of hours. Not long after my friend had to make a phone call and I went to use his toilet. I went straight to the hamper and right at the top of the pile were a pair of his young sisters panties rolled in a ball. She must have removed them just before she left as they were slightly warm. I opened them out. They were yellow with white elastic trim and my fave ribbed cotton. I looked at the. I let him open my legs, thinking he was finally going to give me his dick. I laid my head down and waited as he positioned himself, lifting my legs a little and spreading my labia.I cried out as his tongue flicked my clit, licking it roughly a few times before thrusting it inside me. It had been so long since he'd been down there that I had forgotten how good it felt. My hands went to my breasts as he laved my pussy."You like me eating your pussy, don't you?" he asked briefly.I moaned. "Fuck. He makes a b-line for the dressing rooms, it seems we are going to another good hiding spot. We walk into one of the rooms, he pushes me into and shuts the door, grabbing my shoulders I drop to my knees and suck his cock till he becomes hard again, all the while he is using the mirror looking into my eyes and down at my swollen pussy lips, longing to feel them once again wrap around his throbbing cock. His thick cock filling my cheeks, his hand commandingly on the back of my head, 'good girl'.