The following is a true story - I hope you enjoy it.
*
I'd had a vasectomy after my kids were born. Since then, I'd gotten divorced then remarried. My second wife, Gina, was wanting to have kids of her own. We discussed attempting to reverse the vasectomy, but had pretty much decided against that. Reversal wasn't likely to be successful, anyway. What we didn't know was that Gina was sterile. Had we known that, this might never have happened...
We had fooled around with a single man on occasion. But, Gina tried to be careful. He had a rather distinctive appearance and had she gotten pregnant from him, it would probably have been obvious that the baby wasn't mine. So we decided to ask my brother, Jim to step up and try to get Gina pregnant. We called him and asked him, point blank, if he'd come over to our house and fuck Gina ... try to get her pregnant. He couldn't believe we were asking him that. After asking several times if we were serious, Jim agreed to come over the following weekend.
When he arrived, we just hung out together for awhile - drinking beer (at least Jim and Gina did - I stayed pretty sober.) After we put the kids to bed, we hung out a little longer to give them time to get to sleep. Then, we all went to our bedroom and got in the bed; Gina in the middle, Jim and I on either side. We still had our clothes on at this point.
Gina started kissing me and I was fondling her tits through her top. Then, I started pushing her top up to expose her tits. She rolled over and started kissing Jim. I kept pushing her top up and then pulled it off over her head. Jim put his hands on her bra - and started fondling her tits through the lace of her bra. I was pressed against her back. My cock was already hard and I was pressing it into her ass, humping her ass through our jeans.
I unhooked her bra, and slipped it off exposing her tits to Jim. They were kissing each other and he started kissing her neck, shoulders, and working his way down to her tits. She gave a satisfied moan when he took her nipple into his mouth. At this point, I thought I'd be the first to get naked so I wouldn't miss anything as we went along. So, I rolled off the bed and stripped. Then, I got back into the bed and snuggled up to Gina's back. This time, my bare cock was against her jeans.
Jim and Gina were still kissing. Jim was fondling, sucking, nibbling on her tits. I put my hand on her shoulder to guide her to roll onto her back. I took over fondling, kissing, sucking the tit that was on my side. Jim was concentrating on the tit on his side. He noticed I was naked and decided it was time to get Gina that way, too. He slid his hand down to the button on her jeans and undid it. Then he slid the zipper tab down and slid his hand into her panties. From her reaction, I could tell his hand was busy in her panties. Gina attacked my mouth with a ferocious kiss - so I looked down to see why. I saw where he had his hand and started pushing her jeans down. Gina raised her hips from the bed so I could get her jeans and panties pushed down. While I was working on this, Jim got off the bed and stripped. When he got back in the bed, her jeans and panties were down to her knees and I was still working on getting them off of her all the way. He helped me until she lay naked on the bed between us.
Jim resumed kissing Gina and fondling her tit. He slid his hand down to her pussy again. I raised up to see what he was doing - this was such a turnon. This time he inserted a finger into her pussy and rubbed her clit with his thumb. Jim and I were taking turns kissing Gina and I was focusing on her tits while Jim played with her pussy. Gina bit my tongue when he did this; not too hard, but it was obvious she liked what was happening. I slid my hand down to Gina's pussy but Jim's hand was still there. I felt movement on the bed and backed off a bit to see what was happening only to see Jim start to slide down the bed. He was kissing/licking/nipping her skin along her belly and around her belly button. He was still working over her pussy and clit with his hand.
When he got his face down to her pubic mound he shifted to get between her legs so he could lick/suck her pussy. Gina was loving this. Her eyes glazed over and she grabbed his head and pulled his face into her pussy. I couldn't tell exactly what he was doing, but I could see where his face was and that she was obviously enjoying herself.