"Uuuunnnggghhh!" she breathed. She came again. The climax was stranger than the first one and it left her heart pounding. Wiping her pussy, with some toilet paper, she rose up and listened once more to Hal and Sandy.

The urge to have a look at them was too strong to resist, and moving stealthily to the door she peered into their bedroom.

Maureen had to muffle a gasp with her hand. The light was on in their bedroom and she could see everything. Sandy was riding Hal. They were both naked and for the first time Maureen had a good look at Sandy's nude body. The blonde's tits were heavier than she'd imagined, like two ripe fruit with wide pink nipples. Sandy's tits were jiggling in a crazy dance as she bounced up and down on Hal's cock.

"Oh, yummy, what a good fuck!" Sandy squealed.

Hal responded with a grunt. His hands were clutching Sandy's quivering asscheeks, and now he moved his hands up to her swaying tits and held the luscious globes in his palms.

Maureen had never before seen anyone fuck, and the sight of her brother and sister-in-law going at it just a few feet away overwhelmed her senses. She stood there transfixed, her eyes on Sandy's humping body. At moments she thought she could see glimpses of Hal's cock when Sandy lifted up, but she couldn't be sure. Then Sandy leaned forward to rest her big tits on Hal's chest, and when the blonde raised her ass, this time Maureen could see her brother's thick cock coated with Sandy's cuntjuice.

Stifling a moan, Maureen slipped a hand between her legs to massage her steaming cunt.

"Suck my titties, honey!" Sandy giggled. "They always need attention!"