To be honest, she's charging for things that are at her discretion. She doesn't need to offer them at all, and if a girl wants to charge extra for certain services that she's not that happy including in the price, then I'd rather that she did that than just not offering them at all.
End of the day, working girls charge what they charge, and you either accept it or find a different one. Personally, I think she could just list her price as 140 and go from there, but think of her as offering you a more basic service for £20 less.
End of the day, she's a working girl, there isn't exactly a ombudsman to complain to!
TBH, every service is at discretion. Some use it as an escape clause. What if you saw fictitious prossie Cara Cumlips, sex isn't available as she is on her period after all it's at discretion and you are paying for time OWO lasts for 30 secs before she puts a nodder on it after it's still OWO.
I would rather they just didn't do it. You mention she might not be happy including it in the price fair enough. Why not just not do it full stop if she has issues. At £100 an hour she earns far more than any other job.
Wristjob, I think hinted that extras weren't commonplace a few years ago, or maybe he was referring to this profile. Either way, it's partly due to EEs adding bolt ons, partly due to propaganda spread by rival prossies about STDs - either way they should only be common in parlours.
Extras are never fair IMHO, but you disagree. Even if the prossie was £50 an hour and she had extras it would still be a con. She can charge what she wants, and I have no problem with that. But you seem to think a punter has the right the be ripped off, which is what extras are. Yes, we have a choice of who we see, but because people tell prossies to up their prices or think it's OK to charge extra on top of high rates, punters rarely get good deals anymore and it's not you, it's sycophantic parasites on other sites.