F31 Got insanely horny and masturbated to my sisters hung boyfriend whilst my husband slept in the same room [cheating]

Hey everyone, this just happened last weekend and im still turned on thinking about it. My husband M29 and I drove down to London for my cousins wedding and booked a hotel room with a double bed and a small sofa bed. My sister F26 and her boyfriend K M27 were only planning to come for the day but they got pretty drunk and didnt want to drive back so I offered them the sofa bed.
By the time we got back to the hotel everyone was sloshed. My husband basically passed out on the sofa bed right away. That left the three of us in the double bed. K stripped down to just a pair of light blue boxers and holy fuck hes 6’4 jacked and the outline of his thick black cock was impossible to ignore. My sister who didnt wear a bra under her dress borrowed some shorts from me and went topless saying shed stay under the sheets.
I took a shower trying to calm down but I was already dripping. Came out in a thin tshirt and shorts. It was stupidly hot in London so I ended up on top of the sheets. My sister and K were tossing around and eventually asked if they could sleep on top of the sheets too. I said yes.
A bit later they both passed out. My sisters tits were fully out and Ks big dick print was visible in those thin boxers. I couldnt help myself. I pulled my own top off matching my sister and started rubbing my pussy right there between them. The risk was insane my husband was only a few feet away my sister right next to me and this tall muscular guy I barely know was basically naked beside me. I was grinding my hips and circling my clit like crazy while staring at the huge bulge in his boxers. Came so fucking hard I had to bite my lip to stay quiet.
I felt bold after that and just slept topless the rest of the night.
Woke up first the next morning. My sister woke up soon after and we both laughed quietly seeing each other with our tits out. I quickly put my shirt back on before K stirred. At breakfast my hungover husband pulled me aside and whispered that he woke up in the night to pee and saw both me and my sister topless. Then he dropped the bomb K also woke up while he was in the bathroom and definitely got a good look at my tits.
I got instantly wet again knowing K had seen me like that.
When we got back to the room to say goodbye I gave K a long tight hug and made sure to press my tits hard against his chest. He smelled so good and felt so solid. I cant stop fantasizing about what wouldve happened if Id just climbed on top of him that night.