My wife and her sister talk about sex a lot and in other threads I've described how her sister complains about her husband and his little cock, his premature ejaculation and her yearning for sexual satisfaction. I've also described how I've discretely "accidentally" tube tented in front of her a few times. Anyway the other night during one of their conversations with strong sexual content my sister in law asked how big I was and my wife told her I was about 7.5" but with a tube I was over 8 inches. My sister in law asked what a tube is and therupon my wife asked her if she wanted to see. My wife called me into the front room and from out of nowhere she asked if I would show my tube and how it worked. I about fainted, that is very much not like anything my wife has done before at least where it involves another woman. My heart racing, I playfully asked if she meant just the tube or me in the tube and she said she wanted to show her sister everything. Then my wife asked me to pull down my sweat pants (normal winter evening atire at our house) so I complied, my wife smiled and her sister gasped. I said if I'm going to put my tube on you both have to take your pants off and they said...OK! Over at PEGym I described how on New Years Eve my wife got horny watching a re-run of Hung on HBO and told me to get my tube on. I described how much self control it takes to stay flaccid and put the tube on with a horny wife in the next room. I posted a picture of what I looked like that night in my gallery, its the first one, the one with my dick pointing at 11 0'clock. Well this time it was even more difficult to stay flaccid and get the tube on, almost impossible, but I got it done. When I was ready I walked back into the front room and both women were setting on the couch naked from the waist down! My wife asked her sister what she thought and her sister blushingly said its insane and she'd never seen or heard of anything like it. My wife asked her sister if she wanted to see what it feels like and her sister just spread her legs wide. Now my wife's sister is not at all good looking and she is overweight but with her legs spread I could see she has the same meaty pussy my wife has, that it was very wet and that was enough for me. I asked my wife if she was sure and then asked her sister if she was shure and my wife told us to "go for it". My sister in law, setting on the couch, pulled her legs back with her hands and scooted her ass forward. I knelt in front of her and put the head of my cock against her pussy lips and got it wet then pushed. As with my wifes pussy there was some resistance against the hard swollen head of my cock, then it went in with a slurp and over a period of a couple of minutes I pushed it bit by bit into the hilt. My sister in law was breathing hard and staring at me she said "now this is what its like to be fucked". My wife went into the bedroom and got her Hitachi Magic Wand and her sister said what's that, my wife said this is what I was telling you about, now I'll show you. I was moving in and out slowly and my sister in law was moving her hips up and down and my wife put the Magic Wand against her clit and turned it on. Her sister said "oh fuck, fuck me, fuck me and screamed and I could feel the tell tale goose bumps on her legs as her hips moved and jerked up and down and I coud feel her contractions on the head of my cock. Then my wife said "pull out, my turn" and she got into her favorite doggy position on the carpet. My cock was raging, the head was huge and purple, it hurt like hell in a very hot pleasurable way and I wondered if my glans would explode, but I was too horny to be cautious. I got behind my wife and by this time the head of my cock was big enough I had to push hard to get it in (the glans are about 6" in girth but rock hard) and fucked for about ten minutes until my wife brought hersef to a screaming orgasm with her Magic Wand. I pulled out and all three of us sat on the couch gasping and I was setting in the middle with my cock bobbing up and down against my chest with every beat of my heart. After about ten minutes I walked back into the other room to remove the tube but took the attached picture before I did. I took the flaccid picture just before I put the tube on to show how I looked to my sister in law when my wife asked me to pull my sweat pants down. Sorry for the long post but it was the event of a lifetime and my wife and I have talked and laughed about it every night since. Is there a next time? Hope so!