I let her watch

I have been with Tegan for 9 years and our sex life is unbelievable. She has 2 daughters - one 20 and the other is 23. The young one lives with us. We have had sex with other couples, flashed other people and many more things. A couple of weeks ago Tegan said she needed to talk to me. Usually something good. She told me her daughter had been watching us having sex and gets turned on. She asked if she could come into our room when we were doing it. The main thing is she wants to watch me jerk off. I told Tegan i was ok with it but is she ok with it. Tegan told me she was ok with all of it and she told me Tracey was ok and she wanted to be naked. I told Tegan all we could do is try
A week later we were in bed - naked getting ready to fuck. Tracey came to the bedroom door and asked if she could come in. Tegan told her ok. She came in and sat on the end of the bed. She watched us as we kissed and Tegan moved down and sucked my cock. It was the 1st time i have had anyone watch us. It was such a turn on. That night we fucked, i licked her pussy and we spent about 1 hour until we both cum. When we finished Tracey went back to her room. This went on for at least 2 months. Tracey even went around the house naked and joined us in the pool naked.
I was at home one day with Tracey and she said she wanted to ask me something. I asked her what and she said she wanted to watch me. I was a bit taken back but Tegan had told me what she wanted and i agreed to it. I told her ok and to meet me in the bedroom in a few minutes. I went in, stripped off and got on the bed. Tracey came in and sat on the side of the bed. I started to jerk my cock and she laid down beside me with her head down near my cock. As i looked at her i looked straight at her pussy that was wet. I kept jerking and when i was about to cum i told her, rolled onto my side facing her and let go. I cum and it went over her face and tits. She laid there and just watched. When i finished she got up and left the room. I told Tegan what had happened and she was ok with what happened. That night Tegan and i fucked but Tracey did not come to our room.
For the next few weeks Tracey did not come to our room so i thought it was all over. But one day a bit later Tracey asked me if i would jerk off for her again. I was a bit taken back but i told her ok. I told her to come to my bedroom in a couple of minutes. When she came in she was naked and got on the bed the same as last time. Her head was down near my cock and looking straight at it. I started jerking off and when i looked over at her her legs were open and i could see her wet pussy. I looked at the bedroom door and Tegan was looking in. As i was jerking i felt a hand on my balls, it was a turn on. I kept jerking with my eyes closed and all of a sudden i felt a hand on my cock, it was Tegan. She took my hand off my cock and she jerked my cock. I kept my eyes closed and let her go. I opened my eyes after a while and saw Tracey jerking my cock. It felt like Tegan. I moved my hand over and played with Tracey's pussy, it was so wet and my fingers slipped in. As i was playing with her pussy i felt someone sucking my cock. It was Tracey. Tegan was telling her what to do. I had 3 fingers in Tracey's pussy and i played with her clit with my thumb. I told the girls i was going to cum and i thought Tracey would take my cock out of her mouth but she swollowed it in as far as she could. When i cum she sucked until i finished and she cum as well. Tracey got off the bed, thanked me, kissed her mum and left. Tegan thanked me and after a while we fucked.