"Mom, do you know what you're doing?" Bob asked, his voice shaking.

"Yes, damn it!" Marla sobbed, driving her finger deep inside her cunt. "I'm fingerfucking my hot cunt and letting you two watch me! I know what I'm doing! Sally, take your fucking panties off! Show us your beautiful cunt! Bob, you take your pants off, too!"

Sally and Bob looked at each other, then back at their, mother.

"You mean it, Mother?" Sally asked.

"I mean it, damn it!"

"Mom, you're not gonna be mad at us later, are you?" Bob wanted to know.

"I'll tear your fucking clothes off myself if you don't hurry!" Marla hissed, shoving two fingers up her cunt now.

Sally lifted her ass and jerked her panties off swiftly, giggling like a naughty girl. Bob shoved his panties down his legs and kicked them from his feet. Marla's eyes fixed on them, and she plunged her two fingers into her cunt in a wet frenzy.

"Grab your brother's cock, Sally!" Marla hissed.

Sally slipped to the floor, and with her eyes glazed, grabbed Bob's cock and began to jerk up and down with a hot fist.

"Jack him, honey!" Marla urged hotly. "Jack that hard cock! Bob, shove your hand to your sister's cunt! Feel her fucking cunt up! Play with her cunt, Bob! Sally, jack that hard cock off!"

Both Sally and Bob obeyed their mother. It wasn't because of fear, but because of their intense arousal. Both watched their mother as Marla tossed and twisted her hips about, fucking herself brutally with two fingers. Sally pumped on her brother's cock and Bob was rubbing at Sally's soft, steaming cunt feverishly.

Marla, staring at them with wild eyes, suddenly arched her crotch tightly into her fist, and came.

"Ohhh, shit, shit!" she squealed in a tight voice. "Ohhh, I'm coming already! Oooooh, my… my hot, wet cunt!"

Sally gripped her brother's cock hard, but she wasn't jerking it now. She was staring at her mother, seeing her puffy, hairy pussy lips clamping tightly with orgasm. Bob, awed by what he was seeing, had shoved a finger into his sister's tight cunt, but he wasn't moving it. Both Sally and Bob were fascinated by their mother, watching her come with ass-shaking ecstasy.