I just watched, without speaking, as Erika drew her legs back, opening her pussy wide, inviting Tanya to go down on her. I felt a dry lump in my throa... as Tanya leant down, gently placing her mouth on her twin sister’s special place. She kissed gently and seemed to inhale the scent for a moment before moving back in, to place another gentle kiss on her sister’s cunt. I was practically breathless, watching this sexy spectacle, and I turned to look at Erika’s face. She had that same look of. She felt embarrassed but thrilled for being caught looking and for seeing how he had loved what his woman was doing, and how he loved her watching him. She wanted to go back and taste him, kiss the woman’s wet mouth to taste him twice, give them both her nude body to enjoy and have orgasms wash over her in their bed. Her mind raced ahead. They were here for two more days of lovemaking. She knew she would see the couple again, and knew the man would want to meet her. She hoped. Laura felt sick as she now had to take hold of her brother's thick meat and help guide him into her own body, aiming lower and then instructing when to move.Chris mumbled something under his breath, grabbed a hold of Laura's shoulders and drove forward, again crying out but this time in astonishment as he watched his stiff erection slip easily and unhindered all the way into sister's open vagina, which quickly became greasy, slick and runny.Chris now pulled back some and repositioned himself,. As they neared the stage; their eyes now accustomed to the lower light levels; they saw what appeared to be a divan bed and an unusual looking contraption. It was like a coffee table but it had a cut out on one end and it seemed like a restraining strap across its middle. John now told Mary to lay on the divan and motioned for bill to kneel at the end of the table where the cut out was.Making Bill lean forward; he was adjusted so his cock cage hung in the cut out and the strap fastened him.