It's kinda happened to me before.
She's not replying to your texts because she either felt B Remorse (she felt like a slut or she think she might went too far with texts), because she's just talking shit* or because she's done with that and wants you to take next step..
If shes taken by Buyers remorse, its quite likely she wont reply the way you're looking for, in a while, even if you call her. If that's the case I'd recomend you texting her ocassionaly about other things, lets say, 2 text conversations per week... Yep, you might loose your sexual frame if you start talking about other stuff, but if she's got remorse and you stop talking to her, she might feel even worst and will probly start shit testing you.
Another possibility is that she's just talking shit. What I mean by this is that she's trying to be something she's not, and with you, she's trying to play the "I'm such a sex addict" role, but she's not, and now, she may have started to rationalize all the things she's said to you.
Maybe she thought it was not that much of a good idea to sex things up with you after all. You can still fuck her nice if you manage to change that process in her mind.
Finally, its also likely that she is a slutty experienced girl and does want to have rough sex with you (including chains, whips, latex and knives..) but she's more into the practical side of things, meaning, she's either waiting for you to visit her or waiting for you to make solid plans for when she comes to town... Or at least something else than just texting sexually..
It's up to you man. I'd pay her a visit if I were you.
OH and by the way, its also possible that she just lost her phone, or maybe her mother or any other family member found her cellphone and saw those texts. Maybe she got in trouble....
