There are a few prossies that have a couple of brain cells but most of them are thick. This means that she might be a "nice girl" that you want to help but her real life, which let's face it you know fuck all about unless you're living with her arrrgh may be a bit barmy. So you give her information like hotspot access and after a couple of drinkies she feels loved up with her dodgy boyfriend and "shares" the info cos she stupidly trusts him but then she falls out with him and he decides to use anything he's got to get back at her. Such things happen with young girls and chavs and schemies and other low-brainers even when they don't have to concentrate on maintaining a double life. When she's prossying, not only are the risks increased exponentially but you have even less information yourself to go on.
now ok, we've not met the cute wee slapper and the OP has, and it's up to him, but people are giving good advice here and I hope he's careful and considered it well (preferably after he's just come, and not with her, so he knows it's not his cock speaking).