Grandpa gives her some pills to 'Improve' her

Your grandfather leaned to the side, digging around in his pocket and pulling out his keys. He sat those on the table and continued searching around for something else.

"I was plannin on just slippin these into your food and shit, but since you're being such an obedient little thing I guess I can just give em to ya," he said. He fished out a plain white pill bottle without a label, tossing it over to your girlfriend and chuckling as she scrambled to catch it.

"Take two every day, they'll help you be better."

Carrie looked over the container before she hesitantly opened up the pill bottle, pouring out two of the tiny yellow pills into her hand and rolling them around.

"What do they do?" she asked, but your grandfather was busy drinking his beer and didn't stop to answer or even acknowledge her words. Carrie looked over at you, and after you just gave a shrug she grabbed her beer and took a drink, swallowing the pills down after. Carrie was always a bit too trusting, but your grandfather wouldn't have given her anything too terrible, right?

"They're just gonna make things much more fun for me, I mean for us," your grandfather said. He continued to gawk at your girlfriend's body, a massive smile on his face after seeing her actually take the pills.

"Now, come get back in Grandpa's lap baby girl, I wanna see those huge titties up close."

Carrie again looked as if she was biting her tongue and wanted to say something to him, likely about the baby girl pet name or constant referring to her chest. Instead she walked over and slipped into his lap, mounting him and looking over at you as she did it.

While it was no doubt a hot sight watching your girlfriend half naked and easing herself into your grandfather's lap, you were busy thinking of what exactly the pills would be. Maybe they were aphrodisiacs and your grandfather was hoping to get her so horny she decides to fuck him? Estrogen or something like that to help her tits and curves grow? Just something to knock her out so he could fuck around with her while she slept later? Hell, maybe he fell for some online scam about mind control obedience pills or growth pills that could make her bigger all over, something crazy like that and he actually thought they would work. Whatever it was, Carrie had taken the first dose and you were sitting on the opposite end of the couch, with your girlfriend now settled in with your grandfather happily gawking at her chest barely contained in the undersized top.

(Different and slightly weirder direction here, ideas for what the pills do is certainly welcome or feel free to add on your own chapters and ideas if you prefer. And as always, please consider donating at http://ko-fi.com/masterfulmastus)