I cornered her in the kitchen when the kids were off at their friends house.

"You've been avoiding me," I said. "I touch you and you turn away. I brush against you and you flinch. It's been weeks since we made love."

Fiona tried to avoid my gaze, but I had her trapped in the corner between the kitchen and the island, my arms to either side of her. Her breasts were heaving under her thin t-shirt, and a tear rolled down her pretty cheek. She drew in her breath sharply. I hesitated between drawing back and letting her go, or pushing her to give me an answer.

"It's not you," she mumbled, still looking down. "You're so good to me, you don't deserve this." Still, she would not look me in the face.

"Well, then explain it to me! Something is going on, we need to get to the bottom of it."

Fiona looked into my eyes. "I'm sorry," she said. "I'm so sorry."

"Sorry for what?" I asked.

"Fuck, do I have to spell it out? I had an affair. Dammit, I've had lots of them! I'm practically a sex addict!"

I stepped back from Fiona, thunderstruck. "An affair...lots of affairs? What have I done? Why?"

Fiona sniffled and sobbed. "You are so into your work," she said. "You are on the train by 6 a.m. and don't come back until dinner. You leave me to do the school run, and then I'm just sitting there with nothing to do but clean the house. There's all these stay-at-home Dads now, I meet them online and it's just too easy."

"So, you have sex with them? Am I not enough for you?"

"Once a month is not enough, Giles! I'm in my mid-thirties, the best years are passing me by. Look at my tits! They're starting to sag! I just need to feel wanted!"

I struggled for words. "I can change," I said. "I'll make more time. I'll change jobs. We'll move away...home school the kids...live off the grid...anything!"

Fiona fixed me with a wicked stare. "Can you grow a bigger cock? Can you face fuck me and stick your dick in my ass at the same time? Can you come on my tits while you eat me out? Can you sit there masturbating while you watch some soccer-dad fuck me senseless? That's where I'm at now! I've crossed into a whole new land of sexuality, and I love it!"

"I can try. I never thought I wasn't enough for you. I can give you more."

"Can you? Twelve years of the missionary position once a month, and now you tell me you can change? You've never even gone down on me!"

"Down on you? I play around down there...sometimes. Oh my god, are we so far apart now?" I felt tears rolling down my own cheeks.

Fiona grabbed my shirt. "Come here, you dumb bastard! If we're going to make it you have to change!"

Fiona dragged me down the hall to the living room. She ripped off her t-shirt and her mommy tits swung nicely in a lacy little bra, a type she'd started wearing recently...oh god, now I knew why! She pushed me down on the couch, dropped to her knees and undid the belt of my slacks.

"Honey, we're in the living room! The curtains are open!" I gasped.

"Fuck that, I hope the neighbors are watching," she said. "Get your pants off!"

I struggled out of my slacks and shorts. Fiona squeezed my balls and twiddled my limp cock.

"Want me to suck it?" she said. "Want mommy to suck your little dick?"

"That's not natural," I said. "That's not us. But go ahead, if it will make you feel better."

Fiona rolled her eyes. "You're the one whose going to feel better, trust me!" With that she stretched out my flaccid cock and stuffed it in her mouth, rolling her tongue around the tip and sucking like a whore. In a few seconds, I was stiff as a rod.

"Oh, goodness, that's good," I exclaimed. "Where did you learn this?"

Fiona just shook her head and sucked a big glob of precum from my tip. Letting go, she pushed up onto the couch and gave me a salty, cummy, kiss. The she stood up and undid her bra and let her shorts fall to the floor. Her lovely tits spread out across her chest, and I noticed for the first time that she had shaved her pussy. How had I not noticed? Had we been that distant? My cock spasmed and flipped up and down in delight. Yet, I was still uneasy.

"Really, Fiona, the windows. You're on display!"

Fiona laughed. "Fuck them! Most of the neighbors have seen my ass recently anyways. You're the exception! Now come here and suck my pussy!"

Fiona grabbed my hair and made me kneel so she could straddle my face. She pushed my lips against her smooth mound. I reached up and grabbed her ass cheeks to pull her against my lips and started exploring with my tongue. I had never liked oral, but this time seemed different. I pushed my tongue between her lips and lapped like a hungry kitten.

"Hmm, that's good," said Fiona, with a low moan. "But, let's make it better."

Fiona pushed me onto the carpet on my back. She straddled my face and then leaned back so I could see her breasts swaying as she moved. I began to gobble her pussy in earnest, gasping for air as her cunt almost suffocated me. Fiona moaned and shook her titties as little spasms of pleasure ran up her spine. Then, she moved back a little and spoke.

"Ok, Giles, not bad for a beginner. But, you aren't hitting the right spot. Let me show you."

Fiona moved up onto the couch and sat with her legs spread so I could see. Her fingers spread her lips apart, and she began to rub her clit gently in little circles. The effect was immediate, and she started gasping with pleasure.

"You want me to do that?" I asked.

Fiona beckoned. "Yes, come here and play with it. You don't need to be in a rush. Some men even suck it, gently, and that makes me come almost immediately."

I felt an odd rush at Fiona's mention of "some men." The visual of someone else sucking her pussy stimulated me. What I really wanted to do was to fuck her. So, I got up, pushed her down and stuck my dick into her pussy.

"Fuck no," Fiona said. "Stop that! No fucking until mommy comes! Now pull out and suck my pussy like I told you!"

Chastened, I dropped between her legs and concentrated on licking and sucking on her clit. Fiona must have been close, as she started groaning and moaning and clamping her legs around my head. Then I noticed she had her phone out and was taking a video! I stopped for a moment.

"Don't stop! I'm live streaming! Get back down there!"

"Who is seeing that?" I asked.

"Just some girlfriends," she said. "Get back to work!"

I latched on to her clit and as she held the phone out Fiona began to cum. I had never felt her cum like that, with my face on her pussy, feeling every contraction, getting soaked by the juices flowing from her cunt. It was an unbelievable turn on, and no sooner had she settled down a bit than I rolled her over and stuck my cock in.

"Oh, I feel daddy's horny now," she said. She stuck the phone down between her legs. "C'mon, fuck me now, fuck me hard, daddy!"

I stroked as fast and as hard as I could. My cock isn't that big, but Fiona seemed to go crazy for it. It didn't take long and I unloaded into Fiona's cunt as she squeezed my cock till I felt it was going to break in half. We fell into each other's arms, gasping.

A few moments later, Fiona murmured in my ear. "Your cock is just fine, honey. You could make a lot of women happy with it. Maybe you should?" She giggled and her tits shook.

Post-script: The house is up for sale. I've formed my own company. We're becoming digital nomads. As for sex, well, a brave new world beckons!