Isabella is surprised to see you

"Jesus, John!" Isabella says as she almost walks into you. "How long have you been spying on us?" she asks with a trace of disgust.

"I wasn't spying. Emma and I were... we were just fucking right here until a moment ago."

Isabella is covering her breasts with one hand while the other is still over her crotch holding James's cum inside her. Despite her small attempt at modest you can still get a nice view of her body now that she's close to you - including part of her nipple that she's failed to properly cover.

She notices you eyeing her. "Stop gawking, you pervert!" she snaps at you.

Only then does Isabella really look you up and down and you notice her eyes widen slightly as she takes in the sight of your very large erect cock.