You are perving on Krystal as she is masturbating to her boyfriend on a video call and he blows his load leaving Krystal to cum on her own. She notices you spying on her and wants you to help her finish off. She doesn’t care that you’re her stepbrother. Get your COCK out and let Krystal suck it until she’s ready for you to fuck her brains out resulting in a big cummy mess.