Tell him not to stop

"Don't stop on my account." Shelly tells him with a slight smile.

Sam's face flushes bright red, both of his hands struggling to cover his erect cock, but unable to completely cover it, or keep his eyes off of Shelly's breasts for more than a few seconds.

"I said keep going." Shelly commanded, running a hand across her bare breasts and the other sliding down her stomach to undo the button on her shorts.

Reluctantly Sam removes one hand from his cock, his remaining hand going back to slowly stroking himself as Shelly slid a hand into her shorts, and inside her damp panties. Leaning back against the bathroom wall Shelly runs her fingers across her pussy, playing lightly with her clit as she watches Sam continue to masturbate in the shower.

Feeling the heat inside her grow Shelly pushes off her shorts and panties in a single movement, completely exposing herself to Sam as her fingers **** her pussy, watching as with a gasp Sam's body jerks, thick globs of spunk bursting across his hand.

Shelly is about to let out a moan as well when she suddenly hears the bedroom door begin to open