You follow Anne

You cannot let this opportunity escape you. Your sister is hot and has admitted to jilling off to your photo. You get up from your bed and follow her out of the room. You see her surreptitiously glance back when she notices you coming. You see a little smile on her lips. Watching her form moving in her slight pajamas keeps you hard. She walks straight to her bedroom and goes in, leaving the door open. You enter behind her, closing the door and locking it.

She turns when she hears the lock click. She just stands there looking at you with a grin and a raised eyebrow.

"You've already masturbated to my picture. If you're interested, why wait? You can get involved right now," you say as you unzip your pants and release your very stiff cock. You stroke it in what you hope is a seductive manner. You see her eyes affix on your manhood, and her smile gets bigger.

"I wasn't sure if barging into your room and telling you would put you off or not. Apparently not," she chuckles, looking back up to your eyes. "So, where would you like to start?" She stretches her arms behind her back, which pushes her lovely tits out front and tightens her nightie across them. Her plump nipples are clearly visible through the thin material. Her pink tongue darts across her lips.