Don't Tell Mum

Once again for the third time this week, you have gone out of your way to spy on your step-sister Rose! Mum and Dad are both out of the house and you catch Rose cleaning the stairs, yet she is flashing a bit of upskirt on the sly. You're caught in the act but can an arrangement be made though, you whip your cock out and none of you will tell your Mum about the day's events!