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“Good boy, Brucie! Good boy!” I encouraged him, ruffling his neck. “Mommy's turn this time!” And with a tongue-lolling doggie grin, he finally made his move, jumping up onto Mom's back and starting to thrust himself at her. She gasped in some combination of surprise, doubt, and fear, and I took her hand in mine, giving her a reassuring squeeze. “Try to get a little lower, if you can,” I advised her. “If you let him get all four paws on the ground he'll be way less likely to scratch you with his claws. It'll feel better, too, if you give him more leverage for thrusting.” She did as I said, lowering her hips and pressing those huge, hanging tits firmly into the carpet, her eyes clenched closed as she waited for it to happen. Bruce was having a little trouble finding his mark, as he always did, so I reached in under her with my other hand and spread her thick, meaty lips with my fingers. That got it done, her eyes popping wide as that hot doggie cock finally slid inside. His claws scratched at the carpet as he tried to reposition himself, giving himself one more deep, forceful drive into her depths.

She moaned louder, squeezing my hand and nodding her head. Daddy was clearly enjoying himself too as I caught him in the corner of my eye, grinning wickedly and slowly stroking his still mostly-flaccid cock as he watched the show. Mom was slower than I normally was, either because I didn't really know what she liked yet, playing with her clitty, or just because she was still so conflicted about this whole thing, and her doubt was getting in her way. She did still get there though, gasping and trembling, only maybe ten seconds or so before Brucie started cumming as well. She was still shaking through the aftershocks when her eyes suddenly went wide again.

“Good! Now kiss my bare ass and get out of here and go to class.” I did as I was told. As my lips touched her ass cheek I slid a finger between her legs, parting her wet labia. She slapped my hand away. “You are so bad!” she said, straightening up and smoothing her dress. “I think I created a monster! Now go!”