Caught my step-sister masturbating and started jerking off myself

The cute step-sister got so into masturbating that she closed her eyes and didn’t hear anything, while the step-brother was watching her, getting incredibly turned on by the sight. He suggested to his sister that they should have sex instead, as they would both enjoy the pleasure they were missing. At first, the sister was shy, but then she took his cock in her hand. She turned out to be a very depraved and insatiable bitch.