A magical necklace

When she opened it, there was a necklace inside. It was beautiful. And it looked very expensive. It was golden with a pink gemstone in the shape of a heart on it.

"You bought me this? ...and you're still giving it to me? Why would you spend so much money on somebody that can barely stand being around you?" Joy asked.

"Hey now, no need to be rude. I just wanted to get you something nice. Think of it as a peace offering," he said.

"I'm sorry, Daddy," Joy mumbled, as she picked the necklace up. Wait, why had she said that? She'd never called him that before...

"Put it on," he said, and Joy nodded as she slid the necklace around her neck and secured it. Unbeknownst to her, she'd just sealed her fate. The necklace's magic now had control over her mind...which gave Daddy control over her mind.

"You look so beautiful with that on, Joy," her Daddy said, and then grabbed a nearby recycling bin, "Why don't you help me clean up a bit while you're here?"

"Sure, Daddy!" Joy said happily, taking the bin from him and starting to walk around the apartment, picking up the beer cans scattered about. She was happy to help him out.

Wait, something was-

"You never liked your mother, did you, Joy? But you like me, right?" he asked.

"Of course I like you, Daddy!" Joy giggled, "But, no, I never did like Mom...we're just very different people. We have nothing in common..." But, wait, what did she have in common with Daddy that made her like him?

"Totally fair. She's not very...bright, like you are. And like I am," he said. Oh, that's what she liked about him! Finally a member of her family that kept up with her intellectually... "You know, just because your mother broke up with me, that doesn't mean you have to stop seeing me. We can keep up a relationship."

"Yeah?" Joy asked, as she looked at him, and smiled, "I'd like that, Daddy..."

"Of course, a sexy thing like you coming around my apartment all the time is going to give my neighbours ideas. They're going to imagine you coming in here and wrapping your lips around my big cock. Or letting me fuck that tight ass of yours. Just imagine, you being your Daddy's eager cockslut," he said, his eyes locked onto hers.