My wifes daughter moved in with us when she was 16. She is now 24 and very sexy. My wife and I have always walked around the house freely. I usually strip down to my boxers and sleep nude. My wife is either in a nighty or just a tshirt and sexy panties with no bra. My wife insisted there was no reason to stop this since she was almost 17. Her daughter started to strip as soon as she came home to school.  She usually would just have sexy & very revealing  panties and a mid drift or crop top without a bra. Unlike her mother, she has large breast (D cup) and would cuddle up next to me on the couch to watch tv. Often I would get an erection. I would tell my wife that she would purposely sit close and be sure I get an eyefull of her body and smile when she would see my big boner sticking up against my boxers. My wife said next time let it accidentally on purpose poke through the opening in the front. I asked if she was sure and she said yes as long as i tell her about it.  I said ok. I didn’t mention my wife worked 3 nights a week. A few nights later my wife was already gone when I came home. I heard the shower going so I went in my room and stripped down to a pair of boxers. I found an old pair that didn’t have the button on the piss hole so that if she started teasing me it would grow right out the hole in the front.  Well by this time I hear the blow dryer stop. Remember she did not know i was home and my daughter in law comes walking in the living  room totally nude. She finally noticed i was on the couch and I could tell it scared her until she realized it was me. She let out a deep breath and said OMG dad you scared the shit out of me. I laughed and said I never expected to see you totally naked but I sure am enjoying it. She laughed and took a couple steps toward me and now was about 4 feet in front of me. She said I can sure tell your enjoying yourself and I realized I had an erection to be proud of. It was totally out of the boxers and she was staring at  it. I couldn’t take my eyes off her. She has large breast with large nipples that were hard, very hard. She had just shaved her pussy bald. I said I guess there’s no reason for you to put anything on & I am missing the button to keep my boxers closed. She smiled said she’s fine naked and went in the kitchen to get us both a drink. She returned with our drinks and sat right up against me and says, what do you think mom would think if she saw us. I told her mom told me to have fun with it. She said that mom told her that dad was really enjoying seeing her walking around like she does. She said she doesn’t really  give you enough sex to satisfy me as often as she used to and she appreciates me teasing and we can do what we want. She is fine with it.  She then said she had only seen 2 mens dicks before and said mine was so much larger. I said well if your going to stay nude I guess I should be too. She said definitely. I stood up and before I could pull them down she leans forward and slides them down.  I’m 1 foot away from her face and she reaches out and now is stroking my cock. She says is this okay with you and I say it would be better if you were sucking it. She smiled and gave me an unbelievable blow job. She swallowed every drop. I then dropped to my knees and licked and sucked her pussy while she squeezed and pinched her nipples.  5 minutes later she was moaning and squirming  and then yelled I’m cumming. I stayed on it until she collapsed back on the couch. We agreed to not fuck until her mom got used to us having oral sex. That was about 7+ years ago. On her 18th birthday her mom gave the okay to start fucking her. She still lives with us. Her mom and I work and she does all the cooking & cleaning. She now sleeps in my bed 6 nights a week. I still have sex with the wife that 7th day. We are all happy with this arrangement but have never told anyone this story until now.