The OP seems a bit smitten by this young lady and obviously believes she is worth more than she charges. I wonder if her increases from 60 to 70 and now 80 have been influenced and encouraged by him at all?
Lara, if you are listening, think about the competition and market rates in your area, You need to charge enough to keep the dross away but low enough to attract punters to travel and return for repeat visits. Your lower rate is worth me making a long drive, above 80 makes it less than worth the travel cost. For many of us it's not just the girls rate it's also the travel cost on top that can be a deciding factor.
If the OP wants to pay you more - Let him!!! But don't base your market rate on his opinion alone