She knows I have a lass, that's the thing i daren't incase she turns sour with me!
It's not as if you're blowing her off though, just asking her to be a bit more careful.
It sounds to me like she's just trying to drum up a bit of business with what she see as a good customer. She may well think it's your punting phone she's texting so hasn't considered that it might be a problem.
Obviously though I don't know her and you do, have you got any reason to think she might turn nasty? i.e. is she a bit of a fruitloop / highly strung, or does she think the two of you are in a relationship?
In the event of her getting the hump, aside from your phone number does she have any incriminating info she could use against you e.g. real name, address?
Incidentally, have you tried googling your phone number to make sure you can't be traced through that?