I did my best. I licked from her bum hole to her pussy to her clit and back again. She began to rock back and forth while Cathy bounced up and down on... my cock. I could hear both of them moaning and I managed to get Lizzy off twice and Cathy once before I unloaded.We disentangled ourselves and lay on the bed breathless. “Thank you Brad that was so amazing”. I wasn’t sure if she meant it as Cathy had told me Horas’ tongue was fantastic. But I will take praise when I can get it. The two of them. Asking if I can join you you tell me no and continue, you notice I begin to stroke my cock and can no longer control my self. I beg you if I can join you but you still refuse saying just watch and I will get my chance soon. You bring yourself to orgasm and it turns you on beyond belief to know what you are doing to me. I can no longer control myself and move to the bed, I position myself on top of you and enter you. We begin to move in rhythm as if we have become one. I turn you over. N...n...nothing" She stammered, unable to take her eyes off our naked bodies, even as she scuttled away.I got up and shut the door and locked it again."Do you think she'll tell anyone?" Anita asked, obviously very shaken up about the fact she'd just been caught having rampant sex with her son-in-law on her desk."I doubt it" I said comfortingly, "She has nothing to gain from saying anything, and even if she did you could just deny it, afterall, no-one else has seen me here." I suppose so" She. From a small set of tits they looked fairly large with Keira's body shape. But those nipples were making my cock grow again. What was going on? Why was I getting turned on by my own daughter? Did I see her upstairs watching us and playing with her pussy? All I know for sure was my mind was playing games with me.*********** ************ *********** ************That night I climbed into bed and my mind was racing with thoughts, not least my daughter and what I'm certain she had seen earlier as.