A tiny nightie that you've never seen her wear before

As you heard the bedroom door open you started preparing for the worst. Carrie had time to process what your grandfather said and she was going to storm out here and cuss him out. It would be a huge fight and likely result in your grandfather getting kicked out and Carrie enraged at you for inviting him and suggesting all this in the first place.

At least that's what you expected.

Instead your girlfriend came sauntering into the living room wearing a silk black nightie that you hadn't seen her wear in months and months of dating. It was very clearly small for her, which only made her look better as she walked slowly in front of the both of you. Her nipples were peeking out from the top as her tits overflowed and tried to burst free, and the bottom of it barely made it past her underwear, if she was even wearing any. Her eyes were locked onto your grandfather.

"Is this what you had in mind?" she said with an aggressive edge to her voice. Carrie hopped up and sat on the nearby counter, smiling over at you for a brief second. A grimace quickly returned to her face as she focused on your grandfather.

Your grandfather let out a grunt as he looked your girlfriend up and down, and you looked over to see his hand blatantly slide down to his crotch and massage what was a very obvious and growing bulge.

"See, now THAT'S how a good cum dumpster is meant to dress. Showing off those huge fuckbags and eager to please her man. That's a good girl," he said. You looked to Carrie, expecting her to cuss him out for demeaning her like that. Dirty fun aside, she was a proud feminist and being repeatedly told her place was only to please her man and being called a cum dumpster should have your girlfriend ready to explode.

Instead she just shifted a bit, biting her tongue and not uttering a word of objection to what she was just called as she watched your grandfather's hand rubbing his cock over his sweatpants. Your normally defiant and aggressive girlfriend was simply holding back and sitting on display for your grandpa. Whether she was doing it for your sake to indulge what you originally encouraged, or because she was enjoying this on some level, you didn't know. Eventually her eyes drifted up to his face and she spoke up.

"Thank you, I'm glad you like it and I'm happy to do anything I can to make my man happy," she said, looking over at you for a fleeting second.

"Well wearing slutty shit like that is a nice first step, but we've still got tons more to go before you're a really well trained bitch," your grandfather said. You tried not to react, still astonished at how he was acting when your girlfriend was being so obedient and dirty for him.

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