"Deal, but you stay with me tonight."
Holly's text that morning had been one short sentence, but it said a million things to Erica and I. Firstly, it meant I would be sleeping with another woman for the first time since we had got married. Not, to be clear, the first time I'd be having sex with another woman, but the first time I had stayed apart from Erica. Secondly, before that, I'd be fucking another co-worker, as part of their bargain to cover a shift. Also, for the first time, it would be a woman I liked, rather than one of Erica's friends, who would join us in the bedroom the next day. Erica admitted to being a little nervous - always before, the other women had been friends of hers, and although often they'd been apprehensive about being with another woman as it had a first for several of them, they'd been comfortable with Erica, which had eased their own worries.
Holly was another matter. She didn't know Erica, indeed they'd only met once... at mine and Erica's wedding. She knew of mine and Erica's relationship, and had been making the most of it, along with the strange times in lock-down meaning we had a skeleton staff, and that I had the keys to the school, fucking me at work after hours. Equally, Erica didn't know Holly, although I'd shown her pictures and Erica agreed that she was very attractive, and someone whose face she'd happily have between her legs!
I had to admit to being a little surprised myself that she'd agreed to our deal, as I was pretty certain Holly was completely straight, and she had been very apprehensive when I'd first given my conditions for our deal. Still, in arranging for her friend Natalie to cover today's shift for someone at school (Nat was another teacher at school), in exchange for me sleeping with her, she had essentially pimped out Erica's husband to her friend. It was only fair that Erica gained from the situation too! Erica did add another condition for me to stay the night away though - pictures, and videos. If she couldn't hear the story from me that night as usual, she wanted something to masturbate to!
So the deal had been struck, I would have sex with Nat, who apparently had been going through a dry spell ever since her engagement had broken down a few months earlier, tonight, before staying there to sleep with Holly, and Holly would join Erica and I the next day, to end the week.
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I was pleasantly surprised when Nat and Holly arrived that morning, driving in together as Holly was living with Nat during lockdown to avoid being a risk to her mother.
Nat had taken becoming single just before lockdown as an opportunity to become extremely fit. While never fat, she had shed a fair bit of weight and her slimmer body, wrapped today in a summery, red dress, actually accentuated her large, pert chest even more than before. It helped, of course, that her dress today showed a generous amount of her ample cleavage, probably bordering the limits of the acceptable for work! Still, as I was in charge this week, I decided her dress was fine - she wasn't actually showing anything inappropriate, and the TA working today, Karen, probably described what I got to enjoy looking at all day best when she arrived, "Jesus, Nat! I doubt the dads dropping off today will forget you were working today in a hurry!" Personally, I couldn't help looking forward to sending my wife a video of me cumming all over them later.
Nat simply chuckled and got on with setting up the day's activities, but Holly, also looking hot, but in a different way in skin-tight leggings and a tight vest top for teaching PE, also showing a little cleavage, although with a much smaller chest, shot me a look and a wink before we carried on, too.
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The day was fairly boring. We only had 6 children in that day, so both Holly and Nat took some time to go and complete their weekly phone calls to the parents of their classes, while I had completed my calls at the start of the week alongside the paperwork and phone calls required of the team leader for the week. Karen and I led the activities for the day, but with so few key worker children in the day dragged. I couldn't help being thankful for the view of Nat's cracking tits, as well as Holly's pert arse within her leggings, to help keep me entertained through the day.
Still, the day passed, and I let Karen go a little early due to the limited number of children in that day. I tidied and cleaned up with Nat and Holly, and with Karen gone, the subject of the evening was broached, as Nat asked if I'd like to jump in with them for the ride home, rather than driving separately, since I was staying the night anyway. I agreed, as Holly could bring me in the next day, and it did seem pointless driving both cars to and from the same place.
Once we'd finished, we left together and once I'd finished locking up I climbed into the back seat of Nat's car, taking out my phone to text Erica. Unexpectedly, Holly also climbed into the back, leaving Nat alone in the front to set off driving. I soon understood why Holly had joined me though, as her hands almost immediately found the button to my jeans and she unzipped them, rubbing her hand over my rapidly growing cock through my boxers, before reaching in to take hold and rub up and down the shaft. A few minutes passed like this, Holly running her hand along my erection, before Nat realised what was happening from the driver's seat. She re-positioned her rear view mirror to watch, and Holly released my cock from under my boxers, leaning over to take me in her mouth as her friend watched. Luckily the journey to Nat's was only a few minutes longer, as Holly soon had me groaning in pleasure and wondering if I'd even last until the end of the journey. A thought occurred to me, and I quickly snapped a selfie, smiling at the camera as Holly's mouth bobbed up and down on my cock, and sent it to Erica, letting her know the fun and games had started even before we reached Nat's home.