My wife and I had been married for five years and had some good sex before our twin daughters were born, then our life in the bedroom began to taper off some.
It wasn't that Lisa wasn't attractive any more; she was hotter than ever with the few extra curves she put on after she had the girls.
I don't know if she was self-conscious about the ten extra pounds she had on herself or worn out from the girls, but she didn't seem as interested in sex as she used to be.
On a good month, I may have gotten laid barely once a week when we used to fuck five times a week for hours.
But I still loved her and our little girls, even if I was climbing the walls sexually. It had gotten to the point I'd jack off to porn films after they had all gone to bed.
Until Lisa hired Christy to baby-sit when the girls were toddlers.
Eighteen at the time Lisa hired her, Christy was one sexy-looking redhead, with firm, perky tits that weren't the biggest ones in the world, but they were also far from fried eggs as you could get.
She also had a nice athletic body she'd gotten from jogging and being a cheerleader (and what guy hasn't thought about boning a cheerleader?), and sexy green eyes.
The first night that Christy stood with the girls, Lisa and I had been invited to my boss' house and didn't want to miss the opportunity to attend the charity bash he was throwing, being I was up for a promotion anyway and wanted to make a good impression.
Lisa was incredible in the dress she wore, the few times she looked really hot, and it was all I could do to control myself from getting horny until after the party.
I had a feeling that Lisa wouldn't be interested in fucking, as usual, when we got home that night, though.
I wasn't even getting sex once a week from her by that time. If I was getting pussy from Lisa once a month by then, I considered myself lucky.
But with what would transpire when we came home later that night, it wouldn't matter.
Christy would end up more than a babysitter from that night on. But I didn't know it then until much much later that evening.
When we came home later that evening, I had gone into the house first to check on the girls and pay Christy for sitting with them while Lisa had been bullshitting with the neighbors she had seen outside.
The twins were fast asleep, but I spied who turned out to be Christy's boyfriend, carrying to the bathroom something I had recognized as a used condom.
He didn't see me, and I heard the toilet flush shortly after.
They were both dressed now, but they must have just finished having sex not too long before Lisa and I arrived home.
Christy then saw me. When I asked who the guy was, she introduced her boyfriend Jeff, who came to check to see if she was okay, knowing she was alone with two small children.
I just nodded and shook his hand, not mentioning that I'd seen Jeff with a cum-filled condom headed to the bathroom of my house.
He certainly had been doing more than "checking up on Christy."
More like his cock was checking up on her cunt!
I also didn't mention Jeff and the condom incident to Lisa when she came in either. She wasn't happy to see Jeff as it was.
When he finally left to go to his night job, Lisa made it clear to her that Christy wasn't to have boys in the house when she baby-sat. Lisa would let it go this time, but if she saw Jeff again, Lisa would be looking for another sitter for the girls.
"Kip," she finally said to me, "Would you take Christy home?"
I said that I would, but wanted to put on something more comfortable and cooler first. She nodded, then went to look in on the girls.
I changed into some cut off shorts with no underwear and a T shirt before I indicated to Christy that I was ready to go. She smiled and picked up her books, following me out to the car.
"Lisa's been really crabby lately," Christy observed when we were out of the driveway.
"Yeah, I guess the girls take a lot out of her."
"Thank God you guys didn't come in earlier or she'd really gone off."
"Oh? Why is that, Chris?" I asked, knowing damned well why.
"Well...you know...me and Jeff were doing something on the couch."
"Having sex by any chance?" I said teasingly but at the same time letting her know I saw Jeff with the used condom.
"Oh my God!" she gasped.
"Relax, Chris. You really fucked your boyfriend on our couch? God, Lisa would shit razor blades if she knew!"
"He was gone for a week and I was horny," she shrugged. "And we can't exactly do it at either of our houses."
"This may be none of my business, Chris, but how many times do you guys fuck in a week?"
"Maybe three," she answered.
"Jesus. Somebody sure likes to screw," I teased again.
"But you're a little young to be passing out pussy so freely, aren't you?" I asked in a fatherly tone.
She giggled, saying they used protection and she liked sex, and then asked how often Lisa and I "did it."
"You don't have to tell me if you don't want."
"Chris, I'm lucky if I get pussy once a month from my wife nowadays."
She then did something I never expected.
Christy then slid over closer to me and put her hand on my crotch, rubbing it gently.
"You know, I could do something about that. I don't have to be home right away, so we can pull over and do it somewhere."
"Chris, you're still a teenager and I'm married besides. I could get into a lot of trouble for that."
"I won't tell if you won't," she said huskily, not taking her hand off my dick.
With both the underlying offer to fuck me and her hand on my crotch, I felt a twinge of excitement stir in me.
Still, I felt odd accepting an offer for sex from a teenager, even one as sexy as Christy.
