I wandered into the lounge bracing myself for the worst. I poked my head round the corner and saw Mum lying spread-eagle on the sofa with the cock of ... well-toned black haired businessman right inside her. Well it’s not the worst I’ve seen.“Don’t mind us dear! Just go through to the kitchen for twenty min... Oh!”I didn’t need asking twice. Why did Mum always have to ruin my evening by showing me things far too early? I’d only just started my new school, and things weren’t going great there. Be a good girl and lick mommy’s ass!”Lick mommy’s ass! Don’t cum! DON’T CUM!!I did as commanded. I truly could not resist. I slowly licked her asshole, lapped it lick a dog lapping water. I foolishly poked her opening with the tip of my tongue. She slapped my cock several times. I could feel it bounce like a metronome and I knew pre-cum was sailing from it. I licked and lapped her asshole.“You sure it’s clean?”“Yes Mistress.”“Suck it. Suck my asshole!”I did exactly that. I sucked her. “Becky” I said.“Yes” she answered.“Don’t forget what I said to you. Keep your arms above your head, or I will hurt you badly. Okay?”“Okay” she answered.I lay down on my side next to her and moved my right hand down and pulled up the hem of her little skirt and very gently rubbed my palm over the soft material of her panties where they covered the tiny mound of her pussy. I felt her whole body tremble and she breathed in sharply in apprehension at what I was doing.“Please don’t” she whispered.I. She was my best friend and suddenly she was becoming so much more. Her tongue danced through my wet folds as if she had done this many times before, she was anexpert, so much better than I could ever have imagined. I moaned out loud, forgetting that Julie's parents may be still at home. But Julie looked up, "shhhhhh," she said with a smile before dipping her face back to my wet pussy. She let her tongue slide from top to bottom, tasting me, eating me.I moaned again, oullin gher head tight.