Disclaimer -- All characters are 18 or older.
Author's note -- This series was written in collaboration with Diana R. Parts 1 and 2 of this series should be read before diving into this part.
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How was tennis?" Carol beamed as soon as Will and I walked in the door. "Diana, it looks like my boy really gave you a workout."
Carol was right in a sense. Her son, my 18-year-old nephew, Will, had really given me a workout. The workout just had nothing to do with tennis and everything to do with sex. I cleaned myself up as well as I could before we left the motel, but my hair was still a mess, and I reeked the unmistakable stench of sex. Still dressed in a short tennis skirt with no panties, I left a small cum stain on my driver's seat since I was only wearing a short tennis skirt with no panties. Will's cum must've dribbled out of me while I drove us back.
I just smiled shyly, unable to come up with an appropriate response. I wanted to run upstairs and shower again and change, but I had stupidly promised Will two things while in the throes of passion. One, that I would wear short skirts with no bra or panties, and two, that I wouldn't hide in my bedroom from Carol and Will.
Every time I saw Carol, I felt guilt-stricken for the sexual relationship with her son. That said, the only way to confront a problem is head on, so maybe this part of my promise wasn't such a bad thing, I reasoned. For the other part of the promise, my tennis skirt was as short or shorter than anything else in my closet, so I decided there was no use in changing. I was just very conscious how close my bald pussy and ass were to being revealed. I enjoyed flashing Will, but I didn't want Carol to realize I was sans panties. I knew my actions would seriously hurt her if she found out, but I enjoyed the thrill, and Will filled an emptiness in me that my husband couldn't seem to fill. That said, I couldn't afford to get caught. Carol was a good friend, and I didn't want to lose her friendship or my marriage over this dalliance.
"Mom, Aunt Diana, she's even been teaching me some new things," Will told his mom. He threw me a sly wink when his mother's head was turned.
"That's nice, son. Diana, I can't thank you enough for taking time to go 1 on 1 with my son this week."
I knew what she meant, but God, she had no idea. "It was my pleasure," I responded politely. Truer words were never spoken.
******
My husband came home from work on time for once, and we all sat together for dinner a few hours later. I'd spent the afternoon making conversation with Carol and became more relaxed around her again. It was obvious she didn't suspect anything illicit was going on between her son and myself, so we settled into just catching up on all the family gossip. I kept a throw pillow on my lap while sitting on the couch, trying to make sure not to accidentally expose myself, although I tried to find opportunities to flash Will whenever Carol left to get water or a snack.
At dinner, the conversation continued to flow naturally. My husband opened a bottle of wine, and Carol, my husband, and myself all grew a little tipsy. I saw Will to the side, his gaze fixed on me, and I was reminded I needed to figure out how to visit him tonight for sex without my husband or Carol becoming aware. My pussy moistened at the prospect of being with Will again.
After dinner, we watched a movie on Netflix and talked some more before we all decided to retire to bed. After we closed the door to our room, my husband locked it and warned, "You know, you have to be careful parading around without a bra or panties."
My body froze, and the hair on the back of my neck raised up in fear. Crap, I was busted.
"I love how you spent the whole evening teasing me and turning me on," he continued. "I was ready to take you at the dinner table, but I figured that'd be rude with my sister and nephew standing right there."
I processed his warning and breathed a sigh of relief; he thought I dressed like this for him. The innocent buffoon. "I'm glad you enjoyed it. You've been working so hard lately, honey, I thought you could use the distraction."
"Believe me, I enjoyed the view. Just be careful. I don't know how Carol or Will would take it if they caught on."
"Oh God no!" I exclaimed in feigned horror. "That'd be so embarrassing."
"As large as your nipples are, it's really obvious when you don't wear a bra, you know," he chuckled. "But I loved catching glimpses of your pussy every time you moved in your seat. Now how about we move past the teasing to real action."
I panicked. I was supposed to have sex with Will after my husband fell asleep later tonight, but I didn't want to be dripping my husband's cum out of my pussy onto Will. I had to figure out a way out of this mess.
"Honey, why don't you lay down on the bed and let me freshen myself up for you?" I said breezily as I sashayed over to our walk-in closet for a quick change.
"What did I do to deserve you?" my husband wondered aloud, but if only he knew my real motivation.
I emerged from our closet a minute later dressed in nothing but a completely sheer short black negligée.
His eyeballs nearly bugged out of his sockets at the sight of me. With no bra or panties, my tits and pussy were on full display. "Just lay back and let me take care of you," I said in my sexiest voice. "You've been working hard. You should relax." My hands undid his dress slacks and slid them off. As I slid his boxers down, his cock spilled out, still soft and limp.
I easily wrapped my hands around his cock and started jerking him off to get him hard.
"I'm glad you noticed how I flaunted my body for you tonight," I said, trying to reinforce his belief that my actions were all for him.
"Just be careful," my husband cautioned me. "My nephew, Will, is a young man now. Guys in college, they're horn dogs. If he catches a glimpse of that pussy under your skirt, God knows how he might react. We wouldn't want him to think his respectable Aunt Diana is a slut, would we?"
I laughed uncomfortably. Too late, I thought. Will already knew better than anyone else what a slut I was.
I proceeded to give my husband a blow job, but all I could think about the whole time was Will. I found myself contrasting every physical aspect of my husband against Will. It wasn't a fair comparison, really, contrasting an 18-year-old collegiate athlete against an overweight middle-aged man. My husband wasn't obese, but he was definitely overweight and out of shape. I looked at his round belly and the extra flab on this arms and legs, and it just made me long for Will's trim and toned physique. After all, I worked hard to keep myself in shape and toned; didn't I deserve someone who put as much care and effort into their body?
Predictably, my husband got hard fast, but he didn't last long. I couldn't help but notice his cock felt smaller in my mouth than Will's. Still, I dutifully sucked him off, and soon he splattered a few shots of cum inside my mouth. As his cock quickly softened inside my mouth, I let him slip out, and I swallowed his load clean.
After shooting his load, my husband, not satisfied, quickly dozed off to sleep on the bed. I, on the other hand, went to go brush my teeth and use some mouthwash to wash the cum out of my mouth before going to visit Will. My husband's a heavy sleeper, and I figured it'd be safe to sneak away from my trust once he fell into a deep sleep.
After 30 minutes, my husband's unmistakable snoring indicated he was sleeping soundly. I went to the closet and grabbed a robe. I couldn't chance running into Carol dressed in nothing but a completely see-thru negligée while surreptitiously going to visit her son.
As I opened the bedroom door and entered the hallway, I heard the tv blasting from Karen's room. That noise should provide some cover, I thought. I took it as a good sign as I nervously crept down the hall and softly knocked on Will's room. It felt like an eternity before he opened the door, and I quickly whisked myself into the room as soon as the door opened wide enough.
"I wasn't sure if you'd really go through with it," Will whispered.
"Lock the door," I said as I motioned with my hands.
