The sitter arrived and my folks left. Lisa, the sitter, was about 17, very pretty with long brown hair and a smokin hot body. We sat watching TV for a...while and got aquainted, she had never sat for me before. As we got more relaxed Lisa seemed to be really focused on the movie and didn't appear to notice me looking at her.She was sitting in a chair to my left and as I leaned forward to get my drink from the table in front of me I glanced toward her and was surprised that I could see under her. Then hit the mall were we got matching pink and black corsrts and thongs and bra. Next we hit shoe store and matching 5.5" open toe stilletteoes and sheer suntan silk seamed back thigh hi stockings.Mom pulled me towards a store in the mall.She picked out 2 dark pink leather zip back mini dresses for us which were very tight and short.She said well think thats all we need an we headed home. Well mom dropped me off and told to come over her house later and we could get dressed there.Later on that. Then to my horror Barbara said, "I don't think sorry is enough, Janet would it be alright if I continued Dan's punishment". Without a thought, Janet said, "of course Barbara, be my guest", and within seconds Barbara had replaced Janet in the chair. "Right Dan, assume the position you naughty boy!", commanded Barbara, who was smiling wickedly. I looked down at Barbara's gorgeous tanned legs, her tiny tennis skirt had ridden up and her white cotton panties we're clearly visible, suddenly I felt. There Nicky was nude and pressing her boobs and her friend(Shruti) was licking her pussy and I was fucking Shruti’s pussy in doggy style! I came to my senses and shouted, “What the hell was happening here?!”Tina: this was your surprise and I arranged this for you.Do you like it?Me: yeah! I like it. But tell me what was happening here.Tina: she is my friend Shruti. She was having full sexual desires.But didn’t dare to do sex. We are very good friends.So, I promised her that her seal would be.