I walk out into the living room and see Layla cleaning the floor wth a mini skirt on which is reaveling her big african ass to me i get another hard o... she stands up and i walk towards the door “where is evry1?” i ask “they went to town to buy some groceries” she answers ” so we are alone” “yes” she answers i walk behind her touching her ass with my hard on she turns quickly and grabs me by my dick “i knew it was you this morning” she says angrily “why did u do what u did ? ” i’m dumstruck and. " You guy's are so lame. You need something better to watch than that. If you wanna watch something really good, watch this," and she sits down in a chair, reaches up under her skirt and pulls down her panties, kicking them off to the side, spreads her legs and begins to rub her pussy.Then, she runs a finger up inside her, I couldn't believe it, my sister, sitting here in front of me and four of my friends finger-fucking herself for us."Is this better than what you were watching?" Oh, way. In the evening I went to the lab after school. At first nobody was there and I waited for around 10 to 15mins. As I thought to leave my sir came and asked the assistant to go to the library and get a few books for reference. So now it was only me and my sir in the whole lab. He then sat down and asked me also to sit and asked me what my problem is. I explained to him what my problem is. The whole time he was starring at my boobs. Our school uniform was a salwar because it was a conservative. .. I mean... " It's my fault Martha. I'm afraid when a man is close to a beautiful woman there are some things that just happen. I'm sure you've bumped into that problem before." he chuckled."That's ok. I know men can't help it. Not that it happens very much. I mean I don't dance very often." I felt myself stammering."We can go sit down if you want to stop. But I must tell you it will end my dancing tonight. Sybil has a sore ankle and told me that she doesn't want to dance." Welllll, I don't.