This is going to sound stupid, but get in the habit of making puns, or making references to a pun. This is something that has really helped me. Not only does it help you become quick on your feet, its insanely easy to turn sexual, so it's good for chase framing AND dirty talk. It also works with the whole "misinterpret what she says" thing. Plus it works over text or in person, so it's versatile
Example:
I've been working on a group project with this girl. While I don't think it's going anywhere, we've had some good banter and there's nothing wrong with having a little fun. Anyways, I called her earlier tonight about the project and she didn't pick up. She texts me this.
Her: Can I call you later? I'm tied up right now
Me: I didn't know you were into that kind of stuff

Her: Lol, Just a little bit
See how that works? It works best if you can make puns when she talks about her job or her classes. This is the quickest way to get out of the stuffy conversations that most people have and to get her having fun. They don't even have to be sexual. Regular old puns work great too for this. Sure you'll get a few groans here and there, but people generally like them. Plus, even if she gets annoyed, just keep going. She'll quickly start laughing despite the annoyance, and it gets her out of the neutral zone in regards to you.
With practice, you can easily turn this annoyed tension into sexual tension, and since she's already riled up because of the puns, you can redirect that energy where you want it to go, namely the bedroom. Hell, you could probably create an entire style of game out of this.
Cheers,
TE