You're on stepfamily vacation with your stepparents for the first time since you turned 18 and they've taken you out to the hotel bar. stepMom's had a fair few too many tonight, so you head to the bathrooms just to check on her. As you pass the ladies bathroom, you notice to your horror that the door's been left wide open and your stepmother is on her knees throating the barman's cock! She doesn't even notice you standing there until the guy says something, then staggers to her feet and tries to laugh it off like it's nothing. Turns out it's not the first time stepmom's done this, as she brazenly admits she gets a little horny when she's plastered. You can't decide whether you're more disgusted at her for cheating so shamelessly, or more turned on by having seen the one woman you should never see, expertly sucking dick. She quickly sobers up when you tell her you're going to tell stepdad, and gets back onto her knees to beg you not to. Looking down at your stepmom, you see her in a new light. She's just a desperate horny slut with her face now only inches from the growing erection in your pants. If she wants to cheat and get away with it, who are you to stop her? You tell her you'll keep this little secret from stepdad on one condition: she can cheat all she likes, but only with you. And she's got to let you use her like the slut she is wherever and whenever you want her this holiday, starting right here in the corridor. She puts up a protest but realises she has no choice and you soon have her obediently sucking your cock. The next day you catch her about to head down to the pool. stepDad's already gone down to reserve sunbeds so you decide it's time she makes good on this deal between you. In the sober light of day, stepmom is even more reluctant, pleading about how wrong this all is but eventually concedes. She lays back and asks you to be gentle with her. Sucking your dick last night, she knows you're much bigger than what she's used to, and as you slide yourself inside of her you feel her tight pussy struggling to take you all in. She looks away and hurries you to just get this done with, but soon feels guilty for making you feel bad. It's not that she's not enjoying it. Quite the opposite, she knows she's enjoying this far too much and she shouldnt. She begs you not to make her cum but she can't control herself and feeling her pussy spasming around your cock makes you cum too. You both head down to the pool like nothing happened. This is going to be the best vacation ever! Day after day, you use your stepmom in more and more risky, public situations. She lets you fuck her with her legs wrapped around your waist in the pool as step-dad sunbathes. She jerks you off under your towel in the sauna, letting you cum all over her tits. stepMom's reluctance is fading to lust and you know she's starting to crave her step-son just as much as you crave her, no matter the risk...