Sabrina knew when Sam would cum, her body seemed to react to his, as if their bond made them in sync in any way possible.  With a last thrust, her muscles spasmed around him as they both came, milking his cock, filling her with his warm cum, her loud moans muffled by her pillow.  He collapsed atop her, both sweaty and breathing heavily.  As she came down from the high, her twitches around his cock added to the pleasure, she jokingly called them "aftershocks".<br/><br/>Wiping the hair from her forehead, she suddenly realized someone was in the room with them.  Turning her head as much as she could with Sam's weight still on her, she saw their sister for the first time.<br/><br/>"Kana!"  She swallowed hard, she didn't want to draw attention to their room if anyone else was around and lowered her voice to a loud whisper.<br/>"How long have you been there?"  Her cheeks started to flush pink, aware from that angle, Kana could probably see that Sam's cock was still buried inside her.