Yes, but not suspicious

Helen's head turned slightly at the quiet sounds of passion she could hear from the adjoining room. Putting her book down on the bedside table, she lay back in bed.

As the two lovers recovered, Joe's softening cock slipped from Clair's wet slit. They remained in their positions however, getting their breath back and trying not to make any more noise. They watched Helen intently, nervous for any sign that she realized she might be being observed.

Helen laid back into the bed and closed her eyes. Her hands moved underneath the covers, from her shoulders down to the large swell of her breasts. The fingers teased and caressed the soft skin before plucking at the nipples.

As they saw Helen's hands busy under the bedclothes, Clair felt another thrill of arousal. She moved aside and drew Joe forward so they were standing side by side in front of the false mirror. She dropped to her knees, enjoying the wetness she felt dripping from between her thighs. Her hand lifted Joe's cock - not fully recovered yet, but semi-hard - and guided it into her mouth.

Joe's gaze took in his sexy wife as her skilled mouth licked his cock clean of their shared juices and attempted to return him to action. Looking to the side, he saw through the mirror that Helen's hands had quickly travelled down and were now somewhere between her legs. Their repeated motion could be seen through the movement of the bedclothes, and their effect from the arching of Helen's body. Her head rolled on the pillow and she clenched her mouth shut to avoid any tell tale moans of her own.

The vision of her sister masturbating was driving Clair onwards. Her lips had now reignited Joe's excitement and his hard cock filled her mouth. Her own hand was between her legs, rubbing Joe's cum into her clit in pace with her sister's movements.

Neither Helen nor Clair lasted long, and were both quickly convulsing in pleasure on their fingertips. Joe looked down at his exhausted wife as his cock muffled her moans of ecstasy.

After cumming, Helen switched off her lights and Joe had to replace the mirror on their side. He helped his wife to her feet and guided her back to their bedroom as his hard cock pressed to her bum.