I Stealed My Step-stepsister's Panties and Jerked off in Them. Damn It, She Seen It

After a thoughtless act, the protagonist finds himself in an extremely awkward situation. It seemed his little secret would remain unnoticed forever, but everything changes in an instant when his stepsister unexpectedly reveals his secret. Tension, mutual emotions, and an unpredictable turn of events transform an ordinary day into a story whose consequences can no longer be undone.