You knew I was married and I knew you had a boyfriend but the sex was so good that first time we couldn't help ourselves & kept meeting up whenever you were in town for work but it fizzled out when your job changed. We didn't know who our significant others were as we were typically too busy going at it to chat about our personal lives. You and your fiance (my step-son) drop by for a friendly visit. My wife is traveling for the weekend & won't be back until your last day visiting town. We are all sitting down chatting away, but you're not sure if I recognise you but you recognised me immediately. You're doing things to accentuate your legs & tits rubbing them, uncrossing & crossing, slipping out a nipple, flashing me etc trying to get a rise out of me without your fiance noticing. Shortly after the scene starts your fiance leaves us alone to go get ready to go out for the night. The conversation quickly gets more steamy as I clearly remember you too. Before we know it your tits are out & your dress is bunched up while I'm going down on you & you're trying not to be too loud. My step-son never goes down on you despite how much you love it. You cum just as you hear your fiance coming back down & have just enough time to straighten yourself out before he walks in. Stuffing your panties down the side of the couch to avoid not getting caught. You unsteadily excuse yourself to go change for going out to a club to his friends. Next part would be after your night out. You come into my room still wearing what you wore out, a sexy black number, a low cut revealing lace top, short skirt and high heels. You complain about how my step-son would barely dance with you and basically spent the whole night doing shots with his lame high school friends. He couldn't even make it upstairs so you left him on the couch downstairs. You confess that you might've encouraged him to get extra tipsy because you've been horny since this afternoon and wanted to get fucked harder than your fiance does. While you're talking you're stripping your clothes off in a teasing fashion making me wait until neither of us can hold back anymore. You pounce on me and playfully tease me on the bed, bending over in a skimpy thong and wanting to return the favour from earlier go down on my cock for a sensual blowjob. There's no hestitation, guilt or holding back, you proceed to ride my cock and we don't care how loud we're being with constant moaning, panting and the bed creaking as we're lost in the moment and cum together. You had been having second thoughts about the engagement but are much more into it now that it'll give us an excuse to see each other all the time and resume our affair.