Obsessive neighbor
I'm your sexy neighbor and always felt attracted to you. I know you feel the same. I'm friends with your wife but it's only an excuse to get closer to you.
I knock at your door while she's out because "I lost one of my earrings" and I need your help to find it. It's just another excuse so I can stay, it was hidden in my sleeve.
Knowing she's not around, I seduce you and we start having sex... not for so long since she's back and I "leave". But I don't. I hide in the bathroom and wait for the perfect moment. You catch me and fuck me doggy and guess what? She comes again just to tell you she's going out to run some errands... It's our time!!! I suck your cock and ride you in your bed, just where you both sleeb which makes me so horny. Then you fuck me until we both cum and boom... she's back. I'm so horny by the situation and I play with myself while hidden behind a door and you both have a conversation in the background like nothing happened.
I finally leave, but this time I really forgot something there and it's not an earring... I left my panties.