I fucked my wife's stepsister while she was watching it and masturbate

At first it was just friendly conversation I was talking with my wife's stepsister and there was an easy chemistry between us. The flirting melted into touch: I slipped my hand under her skirt and she responded, then started giving me a deep, eager blowjob. We moved to the bed for a heated 69 and barely noticed when my wife quietly walked in. She didn't interrupt us instead she stayed, watching in secret and masturbate herself as the scene unfolded. We kept going: passionate riding, doggy from the side, and the tension only climbed until my stepstepsister came hard. In the end I gave her a powerful facial finish while my wife, still watching, feel powerfull orgasm and quietly left the room. Intense, raw and voyeuristic exactly how the night escalated.