My wife and I have an agreement where she can ask me to lick her pussy anytime that she wants without any obligations or reciprocation on her part. Apart from it fitting into my schedule at the moment, it's understood that if she asks, I will stop what I'm doing and take care of her. Whether it's only a quick lick so she can enjoy my tongue on her clit for just a few minutes or for an hour of marathon cunnilingus, I'm available at all times. I've told her to be very greedy about asking for it and to not think twice about using my tongue and moving on.
However, she's not mean about it or anything. I'm not her slave and she's not threatening me with whips and chains. She's very conscientious of me and my schedule. She's not going to make me late for work. In fact, we have a very loving, equal relationship full of respect for one another.
It's just.... I love to lick pussy. Her pussy. A lot. It is probably my favorite sex act. Lucky her, right? I just really enjoy going down on her and really focusing on getting her off. Finding what makes her buck and squirm and being rewarded to the sounds or her cumming and the sight of a super sexy woman in the heat of her orgasm. It is so hot. It turns me on more than anything. When she really starts to get into it, I can tell that all of her focus has gone to enjoying the feelings that I'm providing with my mouth. All thoughts of my needs are out the window as we are both fully focused on her orgasm. We get to a point where it's like she's using my face to get off. I start to feel like her sex toy and it's fucking sexy as hell.
We also play with tease and denial a bit. She decides if I get to orgasm or not. I love being in a constant horny state, always filled with desire for her. She loves the attention as well. I love giving up that bit of control to her. I also think that she really enjoys the ability to stay satisfied at all times. Being constantly horny, I'm always ready when she wants it. She still lets me cum often enough. At least once a week give or take. And she still thoroughly enjoys making me cum as well. However, there's plenty of sex in between my orgasms where we finish when she's finished, and I'm left with a hard on desperate for release. But after all the selfless attention she gets, when she does decide to make me cum, she makes it soooo worth the wait and my orgasms are amazing.
So, cunnilingus and tease and denial. My two kinks that really go well together. Having me lick her is such an effortless way to tease me. She's gotten used to using my tongue at her discretion. Whether it's an orgasm before bed, a quick 2 minute lick before she heads out the door, a relaxing cup of tea with me between her legs while she reads her morning newspaper. I will be there when she desires, and I'll probably be as erect as can be.
Enough background. Here is what happened earlier today. It's been about 6 days since my last cum and we've had sex a few times since ending in my delicious frustration. However, it's been about 2 days since we played last. The last couple of nights we've both gone to bed exhausted, so we just snuggled to sleep. Her in my arms and my hard cock nestled tightly in her hand. 2-3 days without an orgasm for her is kind of our normal limit.
Today my wife was at work and I was going to be in town for a few errands.  Grocery run, hardware store for some house projects, etc. Just getting the out-of-house stuff done while the kids are at school.
She texted me late morning asking if I had time. Could I meet her at 12:20 sharp at her car for lunch? Her lunch break is from 12:00 -- 1:00pm and she usually eats lunch in her car and listens to a podcast or something. Every once in a while, I'm in town like today and it's fun to meet up and eat together.
So of course I agreed. I could easily meet her in between stops.
I arrived at her car in her busy parking lot at her work right at 12:20. She works in a big building with a lot of different businesses in it, so the parking lot is quite large and usually quite full. People are walking around the lot since it's a pretty normal lunch time for most people. They're all in their own world though.
When I get to her car, I see her in the back seat behind the driver's seat. The front passenger seat is pushed all the way forward and it has the remanent of a lunch just eaten. I knock on her window and wave hello. She looks up at me and smiles pointing to the seat next to her.  So I walk around to the other side and get in.
She says, "I'm so happy to see you," and gives me a huge passionate kiss like we're teenagers making out. "All day long, I haven't be able to stop thinking about your big hard cock in my hands last night and the things I'd like to do with it."
Hearing this, I'm instantly hard again.
"I woke up to it getting erect in my hand a few times last night. I tried squeezing it a bunch, but you didn't wake up. You must've been having some good dreams last night."
I couldn't remember any of my dreams. I only wish I had woken up.
"I haven't been able to focus on work all day. My pussy was aching and getting so wet thinking about it. I started thinking about how to take care of myself and then I remembered you'd be in town today."
"Oh ya?" I said. "Well, I'm here, what can I do for you?"