After a few minutes she sat up and said that she needed me in her. She undid my pants and pulled down my boxers. Having had a bonner since the beginni...ng of the event my cock sprung up and hit her wrist leaving a smear of my pre-cum on her arm.She gasped and said she hadn’t seen a cock as thick as mine before. She touched my balls and told me that she thought it was sexy. She pulled off her t-shirt and revealed her breasts to me for the first time.I reached behind her and released them from the. Making my way there in the baking sun had left me hot, my flimsy short strapless sun dress stuck to my body in several places. I had been hanging around in the waiting room, uncomfortable in the sticky leather chair, for half an hour before the optician walked in. He greeted me with a smile and pleasantries before asking me all of the usual questions. He was a young man, younger than me, I would say mid-twenties. I got the impression he was new. I recalled this process being faster with the. “Go put on the gift I bought you.” I had already been told what the plan for the rest of the day was and everything I had to do. When I returned he was standing in front of her with his cock in her mouth. He nodded at me. I positioned myself behind her and placed my new strap-on against her vagina. She tried to turn around but my husband held her head tightly. “Keep sucking slut while your sister fucks your cunt.” She muttered something from her cock filled mouth and tried to get up but my. Only stopping long enough to tease and suckle her nipples to full aching hardness, her head would be tossed back in sheer pleasure as I teased a deep throated moan to erupted forth from her lips. My lips trailing down along the hard flat planes of her belly to her soft shaven pussy, where I would spread her legs so that i could gain entry to her soft sweet, wet clit. My tongue flicking out catching her hard swollen nub. My lips would be gently sucking on it while my tongue would dart in.