Twin's Surprise, Part 2

Twin's Surprise, Part 2 by cactusman

"I'm just going to watch," she says, staring at your cock, which is already glistening with pre-cum.

You stroke your cock, feeling very subservient to her as she watches you with a small smile on her face...

When you get too excited and speed up she says "Slowly!" and you are forced to slow down...