My wife didn't think that she would miss sex. She has always said that she knew I would make a good husband, that I would be devoted, and would take good care of her.
After a while, she confessed that she missed actual intercourse, and that my oral skills, while very good, we're not enough for her anymore.
She started back up with the old boyfriend she had been with before she met me. I knew that I just needed to accept it, to keep her happy in our marriage, and to allow her to be satisfied sexually.
Eventually her old boyfriend got transfered out of town. She decided she needed a replacement and started looking. Then, she decided that she liked it a lot, and wanted more variety, and went a little wild for a while.
One guy she played with for a while, really got off thinking that he was sneaking around with a married woman. He really wanted to do it in our house in our bed. She brought him home one day, feeding his fantasy by telling him that I was at work and wouldn't likely be home for a while. She made me hide in the guest room so as not to freak him out. That day I heard extreme sounds of pleasure coming from her, that I had never heard from her before.
They continued regular meetings at our house. When he asked why she was cheating on her husband, she confessed that I was not very good at sex, and wasn't able to satisfy her, and that I had never brought her to orgasm through penetrative sex.
Their situation just progressed from there, to full on cuckolding, although he didn't know that I knew.
Eventually they sort of did a whole range of things, in his process of claiming her as his.
I could sometimes hear them through the heating vents between the master bedroom and my guest room. One day, she was picking a nightgown out of her dresser drawer to wear for him, and he saw one that I had purchased for her one Valentine's day. It was an adorable baby doll nightie with matching ruffled panties, that she said was too young of a look for her, and would make her feel silly to wear it. He asked her to model it for him, and she did. He got very excited and began calling her his "Baby Doll Princess". She cooed girlishly and said, "Yes, make me your Baby Doll Princess."
I now sometimes hear him, when they are fucking, say to her, who's my "Baby Doll Princess"? And she will answer back, "Me! Me! I'm your Baby Doll Princess!" He liked it so much, that he asked her to promise that she would only ever wear that nightgown for him. I have only seen glimpses of her wearing it, when she comes out of their room, to go to the bathroom.
He saw the photo of us, from our wedding day, and told her how gorgeous she looked in her wedding dress. She mentioned that she still had it, but he told her that he imagined it didn't fit her anymore. She was offended and got it out to show him that it did fit her still. Of course, he ended up fucking her in her wedding dress.