Eh, I'm pretty sure it was originally supposed to be a little wink and a nod, but was retconned once EK decided she wanted the GGGB cast to bleed into ORS a bit more than what was planned in the first few chapters.
I'm not sure that's correct. Ashley was already blonde with big fake tits and pumped up lips, long before she became a pornstar. Immediately on becoming a pornstar, she got massive silicon implants, and pumped up her lips even more. So EK can't have ever intended for that to be Ashley. Was she trying to tease us though, by making us initially think it might be Ashley? Yeah, I think she was.
That girl being a redhead, was actually more to do with Gillian, than it was Ashley.